The Harry Potter Encyclopedia
THE HARRY POTTER ENCYCLOPEDIA
Abbott, Hannah - "pink-faced girl with blonde pigtails"; a Hufflepuff
Acid Pops - candy bought at Honeydukes in Hogsmeade that burns holes in your tongue
Aconite - a plant used in potions which is also known as 'monkshood' or 'wolfsbane'
Adventures of Martin Miggs, the Mad Muggle, The - comic books Ron owns
Agrippa - a wizard depicited on the Chocolate Frogs trading card series ; historically, a noted founder in the study of Alchemy
alchemy - a medieval science that is based on turning any metal into pure gold
"alohomora" - a spell to unlock a door
animagi [an-im-AJ-eye] - wizards (plural) who are able to transform into an animal form
Aragog - a huge spider in the forbidden forest
animagus [an-im-AJ-us] - a wizard who is able to transform into an animal form
"aparecium" - a spell to make invisible ink appear
apparate - the magical ability to disappear and reapper at your destination
Arithmancy - a class taken by Hermione, dealing with the study of numbers; an early form of numerology where divination is made through numbers (especially those numbers associated with the letters of a person's name)
Astronomy - a class at Hogwarts for the study of the galaxy, planets, stars, etc.
Aunt Marge - Uncle Vernon's sister; she hates Harry and openly insults him
Azkaban - the wizard prison
badger - the mascot for Hufflepuff
Bagshot, Bathilda - wrote A History of Magic 
Bandon Banshee - banshee banished by a harelipped witch, for which Lockhart took credit
Bane - a centaur in the Forbidden Frest; black haired and bodied
- the King of Serpents; anyone who is fixed with the beam of the giant snake's eyes dies instantly; read about real a real basalisk at Microsoft Encarta
or this gaming page
beater - position on Quidditch team; two beaters per team try to protect their teammates from bludgers. They try to redirect the balls toward their opponants.
Bell, Katie - Chaser on the Gryffindor Quidditch team
Bertie Bott's Every Flavor Beans - wizard candy coming in every flavor, such as chocolate, peppermint, spinach, liver, tripe and vomit!
bezoar - a stone taken from the stomach of a goat which will save one from most poisons
Billius (also Uncle Billius) - Ron's uncle who saw a grim and died 24 hours later
- a ghost who teaches History of Magic at Hogwarts
Black Forest - where Quirrell was rumored to have run into vampires and become "jumpy"
- best friend of James Potter in their Hogwarts days, in Azkaban on murder charges
blood-flavoured lollipops - treats for vampires
Bloody Baron, The
- the ghost of the Slytherin Tower. Not much is known about him other than he is very wickid and scary looking; his eyes are blank, black sokets and his robes are covered in silver blood. He is the only "person" who can control Peeves the Poltergeist. ~Amber, Ravenclaw
bludger - a jet black Quidditch ball, slightly smaller than a soccer ball; 2 bludgers per game which fly around trying to knock players from their brooms. Can cause serious injury.
Boa Constictor - snake at the zoo Harry "talks" to 
Boggart - a shape shifiter which takes on the likeness of one's worst fear
Bones', The - one of four families killed by Voldermort
Bones, Susan - student sorted into Hufflepuff
Boot, Terry - student sorted into Ravenclaw
Borgin and Burke's - Dark Arts store in Knockturn Alley where Harry finds himself after attempting to travel by floo powder
Brazil - country where the first snake Harry talks to says he wants to go
Break With A Banshee - a book by Gilderoy Lockhart that is required for all 2nd years Brocklehurst, Mandy - student sorted into Ravenclaw
broom - n. 1. a long handled implement for sweeping with a brush of straw or similar material (Webster's Dictionary definition) 2. a long handled implement made of twigs which witches and wizards use for flying (also used in Quidditch) ~Danny of Gryffindor
Brown, Lavender - student sorted into Gryffindor
- a Hippogriff (a big beast which is half horse and half eagle)
Bulstrode, Millicent - a Slytherin who duels Hermione during the Dueling Club demos
Burrow, The - name of the Weasley home
Butterbeer - frothy, buttery hot drink served in Hogsmeade (a favorite of Ron and Hermione)
Cadogan, Sir - slightly demented knight that inhabits a painting on the landing of the seventh floor in Hogwarts. Temporary guardian of Gryffindor Tower in Book Three.
"Caput Draconis" - a password for Gryfindor in the first book
Care of Magical Creatures - a class Harry takes in his third year that is taught by Hagrid
Catchpole - village near the Weasley family home
cauldron - a pot which ingrediants are put into to make potions
Cauldron Cakes - a treat on the Hogwarts Express cart 
centaur - a mythical creature that is half-horse and half-man. It has the body and legs of a horse, but the arms and face of a man
Chamber of Secrets - a secret lair at Hogwarts that Salazar Slytherin built after he lost his battle with Gryffindor
- a Ravenclaw fourth year who is the Seeker on the Ravenclaw Quidditch team 
charm - a magical spell which adds properties to something causing it to change
chaser - position on Quidditch team; three chasers per team throw a Quaffle back and forth trying to get it through a goal hoop for 10 points
chipolata - served during the Christmas feast in the first book; it is a type of long, skinny banger (sausage), similar in thickness to American breakfast links
Chocoballs - a chocolate sweet sold in Honeydukes
Chocolate Frogs - a treat on the Hogwarts Express cart which come with Famous Wizards Cards. 
Chudley Cannons, The - professional Quidditch team Ron admires, they wear bright orange and black robes and are 9th in the league
Circe [SIR-see] - a wizard depicited on the Chocolate Frogs trading card series; traditionally a figure from greek mythology, best known for her tendency to turn men into the animals they are most like (mostly pigs and dogs). She appears in two sets of stories, that of Jason and the Argonauts (she helps her neice Medea escape with Jason), and that of the Odyssey. She temporarily turns most of Odysseus's men into swine before she gives them directions home. Thanks to Cathy Weeks
Cleansweep Seven - a respected type of broomstick for flying
Clearwater, Penelope - a Ravenclaw perfect and is Percy Weasley's girlfriend
Cliodna - a druidess depicited on the Chocolate Frogs trading card series; Celtic goddess of beauty and the otherworld
Cockroach Clusters - a rather nasty sweet made of cockroaches sold in Honeydukes
codswallop - nonsense, baloney, malarkey, etc.
Committee on Experimental Charms - office at the Ministry of Magic
Common Room - a general meeting room of each Hogwarts house
Common Welsh Green - a breed of wild dragon found in Britain
- devilish little fairies that reak havoc
- Draco Malfoy's friend and cohort
- is a year younger than Harry. Colin is also in Gryffindor and he may be Harry's biggest admirer (after Ginny Weasley). Colin is always following Harry around, trying to take his picture and get his autograph. ~Katy, Ravenclaw
- woman Harry meets at his first trip to The Leaky Cauldron 
- Hermione's cat who scares Scabbers 
Curse of the Bogies - a spell Quirrell told his students about
Daily Prophet - wizards' newspaper
de-gnoming - removing pesky garden gnomes as described in Gilderoy Lockhart's Guide to Household Pests
Dark Arts - the practice of evil wizards and dark mythical creatures
Dark Lord, The - see Voldemor
tDeathday Party - may be celebrated by a ghost on the anniversary of his/her death
Death Omens: What to Do When You Know the Worst is Coming - book on death omens in Flourish and Blotts with a picture of a Grim on the cover
- leader of the Headless Hunt
- creature who feeds on the happy emotions of humans, leaving one cold and sad. The kiss of the dementor is when the dementor sucks the very soul out of a human, leaving you emotionless.
.De Mimsy-Porpington, Sir Nicholas (see also Nearly-Headless Nick)
- resident ghost of Gryffindor
Dennis - a friend of Dudley 
Dervish and Banges - the wizarding equipment store in Hogsmeade
Devil's Snare - a plant which entraps anyone who it can reach.
Diagon Alley - cobbled street where wizards can do their shopping
diary of Tom Riddle - diary which holds spirit of Tom Riddle
Diggory, Cedric - is the Seeker on the Hufflepuff Quidditch team
Diggle, Dedalus - disapparation - a method of travel for experienced wizards, which involves disappearing from one place and reappearing in another
"dissendium" - a spell which opened a secret passage inside a statue
- class taken by Harry, Ron and Hermione that deals with fortune-telling
- a house elf who tries to prevent Harry from returning to Hogwarts for his second year
Dr. Filibuster's Fabulous Wet-Start, No-Heat Fireworks - a favorite prank of the Weasley twins, they fill the room with red & blue stars that bounce around for at least a half an hour
Draco - see Malfoy, Draco"
Draco Dormiens Nunquam Titillandus" - the Hogwarts motto, translates to: "Never Tickle a Sleeping Dragon"
Draught of Living Death - powerful sleeping potion made of asphodel and wormwood
Drooble's Best Blowing Gum - a treat on the Hogwarts Express cart 
Dueling Club - a club started in Hogwarts to teach about wizard duels
- the current headmaster of Hogwarts; he has a long silvery beard, a very crooked nose and he always wears half moon specticles.
- a trick item you can buy at Zonko's
- the spoiled and pampered son of Petunia and Vernon Dursley. Is extremely overweight due to greed. Enjoys hanging out with his gang and beating up his cousin Harry. Now attends Smeltings, his father Vernon's alma mater. Had to have a pig's tail surgically removed from his backside  Mrinalini, Hufflepuff
Dursley, Petunia - Harry's muggle aunt, sister of Lily Potter
.Dursley, Vernon - Harry's muggle uncle, Petunia's husband
eagle - the mascot for Ravenclaw
Eeylops Owl Emporium - shop on Diagon Alley
Egypt - country where Bill Weasley works for Gringotts
Elixer of Life - a liquid that has the power to make a wizard or witch live forever
Elfric the Eager - subject in History of Magic
elves - small creatures which live deep in the Forbidden Forest where they hold midnight feasts and play pranks on the lost passerby. They are actually very nice despite their tricky nature.
Emeric the Evil - mentioned in Binns' History of Magic class
Erised - see Mirror of Erised
Ern - driver of the Knight Bus
Errol - the Weasley family owl
Eton - a school for muggle borns
Every Flavor Beans - see Bertie Bott's Every Flavor Beans
"Expecto Patronum" - a spell to guard you from the dementors by conjuring a patronus
"Expelliarmus" - disarming charm
Exploding Bonbons - a treat found in the Hogsmede store, Honeydukes
Famous Wizard Cards - trading cards of famous wizards throughthe ages; packaged with Chocolate Frogs
Fang - Hagrid's pet boarhound
Fat Lady, The - woman in a pink silk dress who sits in a portrait and protects the entrance to Gryffindor
Fawcett, Miss - a student at Hogwarts who was injured during Dueling Club demos
- Dumbledore's Phoenix (a bird which dies and is reborn again)
"Ferula" - a spell to create a sling
Fidelius Charm - an extremely complex charm in which a secret is conceled within a single living soul
- Dursley neighbor with whom Harry stayed every year on Dudley's birthdayFilch, Argus
- caretaker at Hogwarts
- see Dr. Filibuster's Fabulous Wet-Start, No-Heat FireworksFinch-Fletchley, Justin
- sorted into Hufflepuff 
"Finite Incantatem" - a charm used by Snape to end commotion by students
Finnigan, Seamus - sorted into Gryffindor, his dad's a muggle, his mother a witch Firebolt - a top-of-the-line broom given to Harry as a gift from an unknown friend
a centaur in the Forbidden Forest, young with white-blonde hair and a palomino body
Fizzing Whizbees - levitating sherbert balls
Flamel, Nicolas - an alchemist and friend of Dumbledore; historically "Flamel was a famous character of his time, an official of the university reputed to be an alchemist. People thought he had got the gold to buy this mansion from finding the philosopher's stone-but really he married a rich widow." [from guidebook Cadogan Paris] Thanks to Jenny Miller
Flamel, Perenelle - wife of Nicolas Flamel
Flesh-Eating Slugs - pest which infested the Hogwarts cabbages
- one of the passwords for Gryffindor houseFlint, Marcus
- captain of Slytherin Quidditch team
- charms teacher at Hogwarts
Flobberworm - a harmless, worm-like magical creature which students must keep alive in order to pass Care of Magical Creatures class
Floo Powder - a fine powder which allows wizards to travel from one place to another
Florean Fortescue's Ice-Cream Parlour - a shop on Diagon Alley
Flourish & Blotts - a bookshop in Diagon Alley
Fluffy - a huge three headed dog protecting a sectret chamber at Hogwarts
Forbidden Forest, The - a patch of woods on the Hogwarts grounds, off-limits to students
Ford Anglia - the Weasley family car, bewitched by Mr. Weasley
Friar (or Fat Friar) - resident ghost of Hufflepuff
Fudge, Cornelius - Minister at Ministry of Magic
Gadding With Gouls - name of a book by Gilderoy Lockhart
Galleons - gold wizard coin that equals 17 Sickles
Gambol & Japes Wizarding Joke Shop - shop on Diagon Alley
ghoul - a creature that lives in attics and bangs on pipes while groaning
Gilderoy Lockhart's Guide to Household Pests - a book owned by Mrs. Weasley
gnome - see also degnome, a small creature which wreaks havoc in Wizard gardens and must be removed
goblins - run Gringotts, the wizards' bank
Gobstones - a marbles-like Wizard game where the pieces squirt a stinky substance when a player loses a point
Godric's Hollow - where Lily and James Potter lived before they were killed
Golden Snitch (or Snitch) - golden Quidditch ball about the size of a large walnut with tiny silver wings. Quidditch match ends only after the elusive Snitch is caught, earning the catching team 150 points.
Gordon - friend of Dudley 
Goshawk, Miranda - wrote The Standard Book of Spells (Grade 1) 
Goyle, Gregory - Draco Malfoy's friend and cohort
Gran - Neville's grandmother whom he lived with
...Granger, Hermione [her-MY-oh-nee] - bushy-haired, buck-toothed, bossy and the smartest pupil at Hogwarts; a Gryffindor
Great Auntie Enid - Neville's ancestor
Great Hall - main gathering point at Hogwarts
Great Humberto, The - a television show airing Monday nights which Dudley enjoys Great Uncle Algie - Neville's ancestor who tried to force magic out of him
Gregory the Smarmy - a statue at Hogwarts
Grey Lady, The - the ghost of Ravenclaw, unnamed in books 1-3; Jennifer reports: "Hundreds of years ago an earl, John Dudley, tried to take over the English throne with his accompliace, Lady Jane Grey. They where beheaded, but Lady Jane's ghost is still said to be walking around Dudley Castle. Her nickname has been for the past several decades, The Grey Lady ghost."
Note from Jenna: the story of John Dudley and Lady Jane Grey is portrayed in the wonderful film, Lady Jane.Grim - a giant black dog one sees as a death omen; when someone sees a Grim, it is believed that he/she will soon die
Grindelwald - a dark wizard defeated by Dumbledore in 1945
Grindylow - a water demon.
Gringotts - wizards' bank hundreds of miles under London, run by Goblins
Griphook - a goblin at Gringotts 
Grunnings - a drill company run by Harry's Uncle Vernon
Grunnion, Alberic - a wizard depicited on the Chocolate Frogs trading card series
Gryffindor - House at Hogwarts, includes Harry, the Weasleys and Hermione Granger
Gryffindor, Godric - the founder of Hogwart's Gryffindor House
Gudgeon, Davey - former Hogwarts student nearly lost an eye trying to touch the Whomping Willow
..Hagrid, Rubeus [HAG-rid, roo-BAY-us]
- the near-giant-sized Keeper of Keys and Grounds
at Hogwarts. Hagrid is a former student of Hogwarts who was expelled for unknown reasons. He is in his 60's.
half-blood - a witch or wizard who has one wizard parent and one muggle parent
Hand of Glory - a withered hand on a cushion which, when a candle is inserted, gives light only to the person holding it
Harry - see Potter, Harry
"Harry Hunting" - a favorite game of Dudley and his friends
Head Boy/Head Girl - an honored last-year student at Hogwarts who looks after the affairs and fellow students of his or her house
Headless Hunt - an exclusive membership of headless huntsmen ghosts who participate in hunt activities such as Horseback Head-Juggling and Head Polo. They will only accept into their membership those ghosts whose heads have been completely severed.
Hebridean Black - a breed of wild dragon found in Britain
.Hedwig - Harry's snowy owl, a gift from Hagrid
Heir of Slytherin - the true heir of one of the founders of Hogwarts (Salazer Slytherin) who could unseal the Chamber of Secrets, unleash the horror within, and use it to purge the school of all who were unworthy to study magic, especially Muggle-born witches and wizards
Hengist of Woodcroft - a wizard depicited on the Chocolate Frogs trading card series
Herbology - the study of plants and mythical plants
Hermes - Percy Weasley's owl that was bought for him when he became a prefect
Hermione - see Granger, Hermione
High Table - table in the great hall where Hogwarts faculty sits
Higgs, Terance - the Seeker on the Slytherin Quidditch team during Harry's first year
Hinkypunk - a creature with a lantern; on dark nights it leads lost people into bogs and swamps
- a magical creature which has the head and talons of an eagle and the back, hind legs and tail of a horse
"His Eyes Are as Green As a fresh Pickled Toad" - a poem written by Ginny Weasly to Harry on Valentine's Day. His Eyes are as green as a fresh Pickled toad, His hair as dark as a chalkboard. I wish he was mine, he's really divine, Our hero who conquered the dark lord.
Hog's Head, The - the pub in the village where Hagrid won a dragon's egg Hogsmeade - a town for wizards and witches. Visits to Hogsmeade begin in a student's third year at Hogwarts
Hogwarts, a History - a book about hogwarts
Hogwarts School of Witchcraft and Wizardry - school for wizard students ages 11-17; probably located in Scotland
Hogwarts Express - train which takes students from King's Cross to Hogwarts
Hogwarts School Song - a song led by Dumbledore which all the students sing, it has no rythym or tune and can be sung however one wishes. Hogwarts, Hogwarts, hoggy warty Hogwarts, Teach us something please, Whether we be old and bald, Or young with scabby knees, Our heads could do with filling, With some interesting stuff, For now they're bare and full of air, Dead flies and bits of fluff, So tech us things worth knowing, Bring back what we've forgot, Just do your best, we'll do the rest, And learn until out brains all rot.
Holidays With Hags - a book by Gilderoy Lockhart
- charm which turns a werewolf back into his human formHoneydukes
- the candy shop in Hogsmeade
Hooch, Madam - head of Quidditch at Hogwarts, teaches first-years how to fly on broomsticks
Hopkirk, Mafalda - employee of the "Improper Use of Magic" office at the Ministry of Magic
house - one of four dormatories the students are assigned to upon arriving at Hogwarts; houses are Gryffindor, Hufflepuff, Ravenclaw and Slytherin
House Elves - small creatures which work as servants in some wizard homes; they can only be set free when the master offers the elf a piece of clothing
House Cup - trophy awarded to the House with the most points at the end of the yea
rhouse points - points awarded to or taken from a house depending on the actions of its members
Howler - a letter which yells messages at extremely loud volumes when opened.
Hufflepuff - a Hogwarts house named for one of the founders, Helga Hufflepuff
Hut-on-the-Rock - a place Uncle Vernon takes the family to hide, where Hagrid locates Harry
Ice Mice - gum bought at Honeydukes in Hogsmeade that "make your teeth squeak and chatter"
Ickle Duddeykins - a "baby-talk" name Mrs. Dursley uses to dote on Dudley
"Ickle Firsties" - a name Peeves uses to mock first year students, meaning "little first years"
"impervious" - a magic spell Hermione put on Harry's glasses so they would repell water during a Quidditch match
Intermediate Transfiguration - textbook for third year Transfiguration course at Hogwarts
Invisible Book of Invisibility, The - available at the bookshop on Diagon Alley... if you can find it
Invisibility Cloak - shiny, silvery grey cloth which makes everything it covers invisible
Jelly Slugs - a sweet sold in Honeydukes
Jigger, Arsenius - wrote Magical Drafts and Potions 
Johnson, Angelina - chaser on the Gryffindor Quidditch team
- friend and conspirator of the Weasley twins; he has dreadlocks
July 31, 1981 - the day of Harry Potter's birth
Keeper - position on Quidditch team, protector of goal
Kettleburn, Prof. - taught Care of Magical Creatures prior to Hagrid
King's Cross - train station for catching the Hogwarts Express (at platform nine and three-quarters); an actual train station in London.
kip - slang for "nap" or "sleep
"knickerbocker glory - an English ice cream dessert. Click here for the recipe.
Knight bus - bus which can be called upon by wizards in distress; summoned by raising the wand arm
Knockturn Alley - a street next to Diagon Alley that is full of dark magic shops
Knuts - little bronze coins, wizard currency; 29 Knutes to a Sickle
Kwikspell - correspondence course in beginner's magic
Leaky Cauldron, The - shabby old pub and inn next to which is the entrance to Diagon Alley
Lemon Drops (or Sherbert Drops) - a muggle treat Dumbledore admits to being fond of.
Licorice Wands - a treat on the Hogwarts Express cart 
- the mascot for Gryffindor
- Defense Against the Dark Arts in Harry's second year; author of self-glorifying autobiographies and five-time winner of Witch Weekly's "Most-Charming Smile Award"
- spell for the leg-locker curse
- forgetful and clumsy classmate of Harry's; a Gryffindor; his gran brought him up and she was a witch
Lord Voldemort - see Voldemort
"lumos" - a charm to light the end of a wand (acts as a flashlight)
.Lupin, Remus J.
- Defense Against the Dark Arts teacher in Harry's third year
MacDougal, Morag - sorted into an unknown house 
Macmillan, Ernie - Hufflepuff student and friend of Justin's
Madam Malkin's Robes for all Occasions - shop on Diagon Alley
Madam Rosmerta - see Rosmerta, Madam
Magical Me - autobiography of Gilderoy Lockhart
Malcolm - friend of Dudley 
- a Slytherin, Harry's arch-enemy at Hogwarts
Malfoy, Lucius - Draco Malfoy's father
mandrake - a plant which has a screaming baby on the end, the cry is fatal to all who hear it. A mandrake plant, when full-grown, is a powerful restorative used to return those who have been transfigured back to their original state.
Marge - see Aunt Marge
Marauders Map - a secret map that shows all the passege-ways at Hogwarts
- Deputy Headmistress of Hogwarts, head of Gryffindor and professor of Transfiguration at Hogwarts
McGuffin, Jim - weatherman on Muggle television 
McKinnons, The - one of four families killed by Voldermort
Merlin - a wizard depicited on the Chocolate Frogs trading card series, traditionally thought to have trained King Arthur
Ministry of Magic - in charge of keeping witches and wizards secret from the Muggles
Mirror of Erised - a mirror Harry finds with writing that reads: Erised stra ehru oyt ube cafru oyt on wohsi. Backwards (or in a reflextion) it reads: I show not your face, but your heart's desire.
- a ghost who haunts the toilet in the girl's bathroom. She moans loudly and complains that no one likes her (which is probably true)
Mobiliarbus - the magical way of moving objects
Mobilicorpus - when someone can't walk on their own this magic makes it seem as if invisible strings are holding the person up
Modern Magical History - a book about the history of the magical world
Monkshood - a plant used in potions which is the same as wolfsbane and also goes by the name of aconite
Monster Book of Monsters, The - textbook chosen by Hagrid for the Care of Magical Creatures course for third-years. It will bite and run away from one unless it is stroked down the spine.
Moon - student sorted into an unknown house at Hogwarts 
Moony - the nickname of Remus Lupin as a student at Hogwarts
Morgana - a witch depicited on the Chocolate Frogs trading card series, traditionally believed to be the half-sister of King Arthur
Mortlake - was taken away for questioning about "extremely odd ferrets" by the Committee on Experimental Charms
Mosag - Aragog's wife
Moste Potente Potions - a book in the restricted section of the Hogwarts library
Mr. Paws - one of Ms. Figgs' cats that she bores Harry with
- Filch's scrawny cat who helps keep the students in line
Mudblood - an insulting term for a half-blooded wizard or a muggle-born wizard
Muggle - wizard term for non-magic folk
Muggle Protection Act - a law written by Arthur Weasley that prevents people of the magical community from using magic in a way that muggles can see or come in contact with. This includes the enchanting of regular muggle objects, such as keys and cars. (Mr. Weasley claims to his wife, however, that unless you are intending to use the object, the fact that the object could do something magical wouldn't matter.) ~Sara of Ravenclaw
Muggle Studies - class taken by Hermione that deals with studding muggles. Hermione says, "It will be interesting to study them from a wizard's point of view".
Nearly Headless Nick (see also De Mimsy-Porpington, Sir Nicholas)
- resident ghost of Gryffindor
"Never Tickle a Sleeping Dragon" - the translation of the Hogwarts motto, translated from: "Draco Dormiens Nunquam Titillandus"
N.E.W.T. - the abbreviation of Nastily Exhausting Wizarding Tests
Nimbus 2000 - a well-respected type of broomstick for flying
Nimbus 2001 - an upgrade on the Nimbus 2000.
- a Norwegian Ridgeback dragon which Hagrid hatches after he wins an egg at a pub.
Norwegian Ridgeback - a rare type of dragon, like Norbert
Nott - student sorted into an unknown house at Hogwarts 
"Nox" - a charm used to turn out the light on your wand after you say "lumos"
"obliviate" - memory charm used by Lockhart which backfires
Ollivanders - shop for wands on Diagon Alley
One-Eyed Witch - statue which contains a secret passage to Honeyduke's
O.W.L.s (Ordinary Wizarding Levels) - test taken at the end of the year by most students at Hogwarts
owls - birds used by the magical community to carry their mail
Padfoot - the nickname of Sirius Black as a student at Hogwarts
Paracelsus - a wizard depicited on the Chocolate Frogs trading card series
Parkinson, Pansy - a Slytherin at Hogwarts
parselmouth - a wizard who has the ability to speak to snakes; thought to be the mark of a Dark Wizard
parseltongue - language spoken by a parselmouth
Patil - a twin sorted into an unknown house at Hogwarts [1
]Patil, Parvati - a Gryffindor and a twin
Patronus - an anti-dementor created by using the spell "expecto patronum" while thinking happy thoughts
"patronus totalus" - a spell to create a patronus; one performs the spell while thinking happy thoughts
Peeves - a Hogwarts poltergeist
Pepper Imps - candy that makes you breath fire
Perks, Sally-Anne - sorted into an unknown house at Hogwarts 
"Peskipiksi Pesternomi" - spell used by Lockhart to get rid of destructive Cornish pixies (it doesn't work)
"Petrificus Totalus" - spell for the Full Body-Bind, causing the subject to lie motionless (petrified)
Pettigrew - a wizard who was a friend of James Potter in his school days
Philosopher's Stone (see also Sorcerer's Stone) - a substance which turns any metal into gold; produces the Elixir of Life which will make the drinker immortal; learn about the actual historical significance at http://tqd.advanced.org/2690/hist/alchemy.html
phoenix - a bird that bursts into flames and rises from its ashes for a re-birth. A phoenix is a very good pet and it's tears can heal wounds.
Pince, Madam - the Hogwarts School Librarian
Pocket Sneakoscope - a very small spining glass top which lights up and makes a high-pitched whistle when there is somebody or something suspicious around
Polyjuice Potion - a potion that makes a person change into a different person
Polkiss, Mrs. - Piers' mother 
Polkiss, Piers - Dudley's best friend 
Pomfrey, Poppy - the stern school nurse at Hogwarts
Potions - a class at Hogwarts taught by Severus Snape. Potions class teaches students how to make potions such as enlarging potions, bubbling potions, etc..
Potter, Harry - a young boy who unexpectedly finds himself at Hogwarts studying wizardry
Potter, James - Harry's father, a pure-blooded wizard
Potter, Lily - Harry's mother who died protecting him from Voldemort; a muggle-born
Prang, Ernie - driver of the Knight Bus; "prang" means "to crash into".
prefect - an honored senior student who helps with younger pupils
Prefects Who Gained Power - a book which interests Percy in a junk shop in Diagon Alley
Prewetts, The - one of four families killed by Voldermort
Privet Drive - the street where the Dursley's live, complete address is: 4 Privet Dr., Little Whinging, Surrey
Professorhead - a name peeves calls Dumbledore
Prongs - the nickname of James Potter as a student at Hogwarts
Ptolemy - a wizard depicited on the Chocolate Frogs trading card series
Pucey, Adrian - chaser for the Slytherin Quidditch team
Pumpkin Juice - beverage enjoyed by wizards and witches at Hogwarts and on the Hogwarts Express
Pumpkin Pasties [PASS-teez] - a treat on the Hogwarts Express cart 
Put-Outer - a device used to turn streetlamps on and off, looks like a silver cigarette lighter 
Quaffle - bright red Quidditch ball about the size of a soccer ball; 10 points every time a chaser gets a Quaffle through the goal hoop
Quality Quidditch Supplies - a shop in Diagon Alley which sells broomsticks and other Quidditch supplies.
Quidditch - wizard sport played on brooms with four balls
Quidditch Cup - trophy given to the winningest Quidditch team at the end of a season
Quidditch season - begins in November
Quirrell, Prof. - nervous, stuttering young professor of Defense Against the Dark Arts during Harry's first year at Hogwarts .
Railview Hotel - "a gloomy-looking hotel on the outskirts of a big city" where Uncle Vernon takes the family to hide (they stay in room 17) 
Ravenclaw - a Hogwarts house named for one of the founders, Rowena Ravenclaw
Red Cap - a creature that lives wherever there is bloodshed
Remembrall - glass marble-sized ball which, when held, turns red to tell the holder if they've forgotten something
"rictusempra" - a tickling charm
Riddle, Tom Marvolo - a young Lord Voldemort; born of a muggle father and a witch mother who died in childbirth
"ridikulus" - a charm to make a boggart take on characteristics of a person or object the sayer is thinking of
Ripper - Aunt Marge's precious bullhound
Romania - country where Charlie Weasley studies dragons
Ron - see Weasley, Ron
Ronon - a centaur in the Forbiden Forest
Rosmerta, Madam - the owner of The Three Broomsticks
7th Floor - entrance to the Gryffindor common room
Scabbers - Ron's hand-me-down rat; fat, old and useless
Scamander, Newt - wrote Fantastic Beasts and Where to Find Them 
Scops owl - a breed of owl, very small and used for "Local Deliveries Only".
Secret-Keeper - Seeker - Quidditch position for catching the Golden Snitch
self-shuffling playing cards - a deck of cards that mix themselves
"Serpensortia" - a charm used to summon snakes
sherbert balls - candy bought at Honeydukes in Hogsmeade that let you levitate a couple inches from the ground while sucking on them
sherbert drops (see also lemon drops) - a muggle treat Dumbledore admits to being fond of
Shooting Star - an outdated flying broomstick model
Shrieking Shack - a shcak located behind the Whomping Willow. One must push a button on the Whompin WIllow to turn it off in order to safely pass to the Shrieking Shack.
Shrivelfig - an ingredient in magic potions, used in Shrinking Solution
Sickles - silver coins, wizard currency; 17 Sickles to a Galleon
Silver Arrow - a kind of broomstick that is no longer being made
Sinistra, Prof. - teacher of Astronomy at Hogwarts. His lessons are given every Wednesday at midnight on top of the highest tower
Sites of Historical Sorcery - book, quoted as saying that the inn at Hogsmeade was the headquarters for the 1612 goblin rebellion, and that the Shrieking Shack is the most severely haunted building in Britain.
Skele-Gro - a type of medicine you take when someone has deboned you are. When you take skele-Gro your arms grow back, but it's painful..
Slytherin [SLITHER-in] - a Hogwarts house named for one of the founders, Salazer Slytherin
Slytherin, Salazer - the founder of the Slytherins house, a parseltoungue.
Smeltings - private school Dudley attends, Uncle Vernon's alma mater
Smeltings stick - stick used at Smeltings to hit people with while the teachers are not looking. This is suppoesed to be good training for later in life.
Smethley, Veronica - Lockhart fan to whom Harry was addressing a letter when he first heard the Basilisk's voice
snake - the mascot for Slytherin
Snape, Severus - Hogwarts Potions teacher, wants to teach Defense Against the Dark Arts, leader of Slytherin House
Sneakoscope - see pocket sneakoscope
Snitch (or Golden Snitch) - the smallest Quidditch ball, gold with silver wings; earns 150 points for the team who catches it
Snowy - one of Ms. Figgs' cats that she bores Harry with
Sonnets of a Sorcerer - a cursed book, everyone who read from it spoke in limericks for the rest of their lives
Sorcerer's Stone (see also Philosopher's Stone) - a substance which turns any metal into gold; produces the Elixir of Life which will make the drinker immortal
Sorting Hat - an old wizard's hat which assigns new students to their houses at Hogwarts
Spell-O-Tape - unpredictable wizards tape used to mend broken wands
Spinnet, Alica - chaser for Gryffindor Quidditch team
Spore, Phyllida - wrote One Thousand Magical Herbs and Fungi ; the prefix "Phyll" means leaf, and a spore is a single-celled reproductive organism that is resistant to drying out and heat. It's capable of growing into a new organism. The reason it's funny its that mushrooms reproduce via spores, and Phyllida Spore is the author of One Thousand Magical Herbs and Fungi (fungi are mushrooms). Thanks to Cathy Weeks
Sprout, Prof. - professor of Herbology (plants) at Hogwarts; a sprout is a small or baby plant
Squib - the child of two wizards who shows no wizarding ability
Stan - conductor of the Knight Bus
Standard Book of Spells - required text at Hogwarts ("Grade" indicates year - "The Standard Book of Spells, Grade One" was required for first year students, "Grade Two" for second year, and so on)
Stink Pellets - Small brown pellets that stink when tossed or dropped.
Stonewall High - the public secondary school Harry would have attended at the Dursley's 
Study of Ancient Runes - a class taken by Hermione 
sugar quills - delicate sugar spun quills that you can suck on in class "and just look like you're thinking what to write next." (Ron, Book 3) Sold in Honeydukes.
Switch, Emeric - wrote A Beginners' Guide to Transfiguarion
tarantallegra" - a dancing spell
Ted - newscaster on Muggle televsision 
Thomas, Dean - a Gryffindor; a tall black boy and a fan of soccer who shares a room with Ron and Harry; he is a good artist
Three Broomsticks, The - a pub in Hogsmeade
Tibbles - one of Ms. Figgs' cats that she bores Harry with
Time-Turner - a necklace with a hourglass on it
toad peppermint creams - Tom - bartender at The Leaky Cauldron
Toothflossing Stringmints - Floss with different flavores.
transfiguration (see also Transifugration) - a spell which changes the nature of a person or object completely -- the molecular structure of the object is altered
Transifugration (see also transifugration) - a class at Hogwarts taught by Professor McGongall
Travels With Trolls - a book by Gilderoy Lockhart
- basically crusts, bread crumbs, lemon rind, eggs, flour and golden syrup baked like a pie [thanks to Laura]
Trelawney, Sybil - Divinations professor at Hogwarts; obsessed with dark predictions and death predictions. Hermione gets fed up with her and leaves her class. Ron and Harry think she is crazy.
Trevor - Neville's pet toad who is always escaping from his owner
Trimble, Quentin - wrote The Dark Forces: A Guide to Self-Protection
Tuffy - one of Ms. Figgs' cats that she bores Harry with
Turpin, Lisa - student sorted into Ravenclaw at Hogwarts 
Twig Trimmer - a device used to cut unruly twigs off your broom
Uncle Billius - see Billius
Unfogging the Future - book by Cassandra Vablatsky
unicorn - a horse-like creature with a horn coming out of its head. If you drink its silvery blood, it will keep you alive for a limited time if you are near death... at a price. You will have a cursed, half-life. It is faster than a werewolf and very graceful. It's hair is used in Potions.
Uric the Oddball - mentioned in Binns' History of Magic class
Vablatsky, Cassandra - wrote Unfogging the Future
Vector, Prof. - the Arithmancy teacher at Hogwarts. Vector is a mathematical term.
Viridian, Vindictus - wrote Curses and Countercurse (Bewitch your Friends and Befuddle Your Enemies with the Latest Revenges: Hair Loss, Jelly-Legs, Tongue-Tying and Much, Much More) 
Voldemort - powerful Dark Wizard whom most refer to as "You-know-who". He killed Harry's parents and left a thunder-bolt scar on Harry's forehead in a failed attempt to kill him as a baby.
Voyages With Vampires - a book by Gilderoy Lockhart
"Waddiwasi" - a spell used by Prof. Lupin to send gum up Peeve's nose 
Waffling, Adalbert - wrote Magical Theory and A History Of Magic
wand - for magic (willow is good for charm work, mahogany for transfiguration)
Wanderings With Werewolves - a book by Gilderoy Lockhart
Warbeck, Celestina - singing sorceress popular on the Whitching Hour radio program
wattlebird - Gryffindor password at the beginning of Book 2
Weasley, Arthur - Ron's father, works in the Misuse of Muggle Artifacts department of the Ministry of Magic and enjoys tinkering with Muggle items
Weasley, Bill - was head boy at Hogwarts, works for Gringotts in Africa
Weasley, Charlie - was Quidditch captain at Hogwarts, in Romania studying dragons
Weasley, Fred - twin of George, Gryffindor, Beater on Quidditch team
Weasley, George - twin of Fred, Gryffindor, Beater on Quidditch team
Weasley, Ginny - youngest Weasley and only girl, has a crush on Harry
Weasley, Molly - mother of Ron, wife of Arthur, very matronly and worrysome
Weasley, Percy - the Gryffindor Prefect, currently the oldest Weasley student at Hogwarts.
Weasley, Ron - youngest Weasley boy, Harry's best friend
Wendelin the Weird - a witch from the medieval times who loved getting burned and performing a Flame Freezing Charm; was burned forty-seven times in different disguises
werewolf - a half man and half wolf creature
Which Broomstick - book or catalogue (with order form in the back) which describes the different makes of flying broomsticks
Whizzing Worms -
Whomping Willow - a tree outside Hogwarts that becomes violent against anything it comes in contact with
"Wingardium Leviosa" - a spell to make things fly
Witches Weekly - magazine for witches which has contest for most charming smile
Witching Hour - a wizard radio program
Wizards Duel - a one-on-one fight between wizard's, a challenge
Wolfsbane - a plant used in potions which is the same as monkshood and also goes by the name of aconite
Wolfsbane Potion - a potion which makes a werewolf safe during the full moon
Wood, Oliver - captain and Keeper of the Gryffindor Quidditch team
Wormtail - the nickname of Pettigrew as a student at Hogwarts
Wormwood - an herb that with it and ashphodel it makes a sleeping potion so powerful it's known as the "drought of living death"
Year With The Yeti - a book by Gilderoy Lockhart
You-know-who - the term given to Lord Voldemort when people are too afraid to say his name
Yvonne - Mrs. Dursley's friend, vacationing in Majorca 
Zabini, Blaise - student sorted into Slytherin at Hogwarts 
Zonko's - the joke shop in Hogsmeade