3 D's: The most important points to remember when apparating: Destination, Determination, and Deliberation.

#12 Grimmauld Place: The former home of Sirius Black bequeathed to Harry. It was used as a meeting place for the Order of the Phoenix.

Advanced Potion-Making: A textbook writing by Libatius Borage that is used for 6th year Potions classes at Hogwarts. Harry's second-hand copy borrowed from the school once belonged to the Half-Blood Prince, who had scribbled notes all over the book's pages.

Amortentia: The most powerful love potion in the world, recognizable by its mother-of-pearl sheen.

Bezoar: A stone taken from the stomach of a goat that will protect those who consume it from most poisons.

Borgin & Burkes: A store in Knockturn Alley that sells sinister objects.

Drought of Living Death Potion: The potion Harry successfully mixes with the help of the Half-Blood Prince to win a bottle of Felix Felicis. One of its ingredients is a sopophorous bean that should be crushed with the flat side of a silver dagger --- according to the Half-Blood Prince --- stirred into the liquid with one clockwise stir after every seven counterclockwise strokes. The liquid will change color based on stages, from black-currant, to clear, to lilac.

Felix Felicis: A liquid luck potion Harry won in Potions class. Two tablespoons must be taken with breakfast, and for twelve hours, the person who consumes the potion will succeed in all his/her endeavors. However, an excess of Felix Felicis will lead to giddiness, recklessness, and overconfidence. It is a banned substance in organized competitions like sporting events, examinations, and elections.

Hand of Glory: A shriveled arm that provides light only to the person holding it.

Horcrux: Something said to be "the wickedest of all magical inventions"... Very little is known about them, and a young Voldemort tricks Professor Slughorn into giving him information on how to create and use them.

Inferi: Dead bodies that have been bewitched and reanimated to do a dark wizard's bidding, acting as puppets of sorts. In THE HALF-BLOOD PRINCE, Voldemort uses them to guard his Horcruxes.

Legilimency: The act of mind-reading

Levicorpus!: A nonverbal spell invented by the Half-Blood Prince, handwritten in Harry's Potions textbook; the person on whom the spell is cast will be hung upside down by the ankle.

Liberacorpus! will undo this spell.

Muffliato!: A spell invented by the Half-Blood Prince, handwritten in Harry's Potions textbook; it fills the ears of anyone nearby with an unidentifiable buzzing, so that conversations can be held without being overheard.

Occlumency: The act of mind-blocking, or making one's mind a clean slate to prevent Legilimency.

Office for the Detection and Confiscation of Counterfeit Defensive Spells and Protective Objects: A new office set up by the Ministry of Magic in response to the large number of faulty charms and spells to protect wizards and witches from Lord Voldemort and his Death Eaters. This department is headed by Arthur Weasley.

Sectumsempra!: Another new spell created by the Half-Blood Prince; it is very dangerous and should be used only on enemies.

Splinching: A separation of random body parts while apparating.

The Unbreakable Vow: A spell that binds a wizard/witch to a promise; when it is made, flames from each person's wand link together like clasped hands, and a third flame from a Bonder twists around them to bind them together.

Weasley's Wizard Wheezes: A joke shop in Diagon Alley owned by Fred and George Weasley; some of the many objects the store carries are Patented Daydream Charms, Spell-Checking quills, and love potions that seem to be quite a hit among the female students at Hogwarts...

Wrackspurts: Invisible spirits that float into a person's ears and makes his/her brain fuzzy.

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HARRY POTTER Books 1 through 5

Animagus: A witch or wizard that can change into animal form.

Apparate/Disapparate: The ability of a witch or wizard to vanish from one place and appear in another almost instantly.

Aragog: Leader of the spiders who live in the Forbidden Forest.

Auror: Dark wizard catcher.

Azkaban: The wizard prison.

Basilisk: King of Serpents, snake monster in the Chamber of Secrets. Can kill with its stare.

Beater: Position on Quidditch team. Beaters keep Bludgers away from their team.

Beauxbatons Academy of Magic: Another witchcraft and wizardry school. Competes with Hogwarts and Durmstrang in the Triwizard Tournament in GOBLET OF FIRE.

Bertie Bott's Every Flavor Beans: Magical jellybeans that come in literally EVERY flavor, including spinach and liver.

Blast-Ended Skrewts: Mean-spirited, crab-like creatures bred by Hagrid, which Harry and his classmates must care for in GOBLET OF FIRE.

Bludger: A Quidditch ball that flies around the field trying to knock players off their brooms.

Boggart: A shape-shifting monster; takes the form of whatever it thinks will frighten those near it.

Bubotubers: Magical plants that look like slugs. Their pus has healing qualities, but can also cause painful blisters when it comes directly in contact with skin.

Canary Cream: Creamy snack that turns those who eat it into canaries. Invention of Fred and George Weasley.

Chamber of Secrets: Hidden chamber within Hogwarts, built over a thousand years ago by Salazar Slytherin, one of the school's four founders. According to legend, only Slytherin's true heir can ever open the Chamber, unleashing a horrible monster that supposedly lives inside it.

Chaser: Quidditch position. Chasers try to score with the Quaffle.

Chocolate Frogs: A popular candy among wizards.

Chudley Cannons: Ron's favorite Quidditch team.

Cruciatus Curse: One of three illegal Unforgivable Curses. Causes intense pain. It's used to torture someone. "Crucio!"

The Daily Prophet: The wizards' newspaper.

Dark Mark: Skull and serpent symbol that is the sign of Voldemort. It appears in the night sky during the Quidditch World Cup. It's said that the Death Eaters, Voldemort's followers, display the sign whenever they have killed.

Death Eaters: Name of the group of Dark wizards who are Voldemort's followers.

Deathday: The day when a ghost celebrates when he or she became a ghost.

Dementor: Dark, cloaked, faceless creatures from Azkaban, appearing in Book Three (PRISONER OF AZKABAN), where they are guarding Hogwarts to protect students from Sirius Black. When they get near Harry he gets chilled, clammy and faints. A dementor's kiss will suck out a person's soul.

Diagon Alley: Mysterious, magical twisting street of shops where wizards and witches shop for supplies. Gringotts bank located here, also.

Dueling Club: Hogwarts club where students pair off and cast spells against each other, learning how to defend themselves.

Durmstrang: Another wizarding school in Europe. No one knows its true whereabouts, but people assume it's in the cold Far North.

Firebolt: State-of-the-Art racing broom that can even go faster than a Nimbus Two Thousand. Harry receives one for Christmas in Book Three (PRISONER OF AZKABAN) but doesn't know who it's from.

Floo Powder: Magical, glittering powder that, when sprinkled, transports a wizard or witch from one place to another in a flash.

Flourish and Blotts: Wizard bookstore in Diagon Alley.

Foe-Glass: A magical mirror that shows one's enemies. Moody has one of these.

Forbidden Forest: Forest surrounding Hogwarts. Home to unicorns and other mystical creatures. Very dangerous; Hogwarts students are told to stay away from it.

Galleons: Coins, form of wizard money.

Gillyweed: Magical plant that, when eaten, gives a person gills like a fish, allowing her or him to breathe underwater.

Goblet of Fire: A large wooden cup that is filled to the brim with dancing blue flames. It magically selects the contestants for the Triwizard
Tournament.

Golden Snitch: The most important ball in Quidditch. It's fast and hard to catch; must be caught by the Seeker to earn 150 bonus points, which usually wins a game.

Gringotts: The wizards' bank.

Gryffindor: One of four student houses at Hogwarts. Named for Godric Gryffindor, one of Hogwarts's four founders. This is the house where Harry, Ron and Hermione live.

Hippogriff: Magical creature that is half bird and half horse.

Hogsmeade: Wizarding village that Hogwarts students (third years and up) can visit occasionally on the weekend. Filled with shops like Zonko's Joke Shop and the Shrieking Shack.

Hogwarts School of Witchcraft and Wizardry: Boarding school housed in an old castle where witches and wizards like Harry and his friends learn their craft --- and much more.

Honeydukes: An amazing candy store in Hogsmeade.

Howler: A screaming, scolding letter sent by owl. Ron receives one from Mrs. Weasley after he flies the family car without permission.

Hufflepuff: One of four student houses at Hogwarts. Named for Helga Hufflepuff, one of the school’s four founders.

Imperious Curse: One of three illegal Unforgivable Curses. When cast, it gives a wizard total control over another person or creature. "Imperio!"

Invisibility Cloak: A "silvery gray" cape that makes its wearer invisible. Harry receives it as a Christmas gift in Book One but does not know who it's from. It arrives with a note explaining that the cloak once belonged to Harry's father.

Keeper: Player who guards the goal posts in a Quidditch game.

Killing Curse: One of three illegal Unforgivable Curses. It will kill a person or creature when cast. "Avada Kedavra!"

The Knight Bus: Magical bus that serves as emergency transport for stranded witches and wizards. It picks up Harry in Book Three (PRISONER OF AZKABAN).

Knockturn Alley: An alleyway of shops devoted to the Dark Arts. An offshoot of Diagon Alley.

The Leaky Cauldron: A "tiny, grubby-looking pub" at the entrance to Diagon Alley where witches and wizards hang out.

Little Hangleton: Town where Tom Riddle and his family once lived. Many years ago, Mr. and Mrs. Riddle and their son Tom were found dead in the house.

Mandrake: A screaming plant that helps "return people who have been transfigured or cursed to their original state." Comes in handy in Book Two (CHAMBER OF SECRETS).

Marauder's Map: Map showing every detail of Hogwarts castle and the castle grounds. It magically shows people moving around within the school, too. Also shows secret passageways to Hogsmeade, the wizarding village.

Ministry of Magic: Council whose main job is to keep wizards and witches a secret from Muggles.

The Mirror of Erised: A mirror that Harry discovers in a hidden room at Hogwarts. Whoever looks in the mirror sees his or her greatest desire reflected back at them.

Mudblood: A mean name to call someone who is Muggle-born (born to non-magical parents, like Hermione).

Muggle: A non-magical person. Examples: the Dursleys, and most of you reading this glossary....

Mungo's Hospital for Magical Maladies and Injuries: Where wizards can recuperate and receive treatment.

Nagini: Gigantic 12-foot female snake whose venom is used as food by Lord Voldemort as he regains his strength and body.

Nimbus Two Thousand: The super-duper, fast-flying broomstick that Harry receives as a gift. It helps Harry become an ace Quidditch player.

Number Four, Privet Drive: The address of the Dursleys, Harry's Muggle family.

Omnioculars: Magical binoculars that have instant replay and slow-motion features.

O.W.L.s: Ordinary Wizarding Levels. Exams Hogwarts students must take at age 15 (fifth year).

Parselmouth: A witch or wizard who can talk to (and understand) snakes. A talent that Salazar Slytherin, one of the founders of Hogwarts, was famous for. Harry is a Parlsemouth.

Patronus: An "anti-dementor," it guards a person from dementors.

Pensieve: Magical basin that stores a persons thoughts and memories. Dumbledore has one.

Pigwidgeon: Tiny gray owl belonging to the Weasleys. Delivers most of Ron's mail.

Platform nine and three-quarters: The magical platform (invisible to Muggles) at London's King's Cross station where Hogwarts students board the Hogwarts Express train to school.

Pocket Sneakoscope: A tool that lights up and spins whenever someone untrustworthy is near.

Polyjuice Potion: Changes a person into someone else.

Portkey: Object (which usually looks like trash to a Muggle) that can transport wizards from one place to another at a specific, prearranged time. Harry, Hermione, and the Weasleys travel this way to the Quidditch World Cup in GOBLET OF FIRE.

Quaffle: A ball used in Quidditch to score goals.

Quick-Quotes Quill: Magical quill that writes by itself. Used by nasty Daily Prophet reporter Rita Skeeter.

Quidditch: Wizard sport played up in the air on broomsticks. A bit like soccer. Harry is the best player on his house’s team.

Quidditch World Cup: Championship tournament like World Cup Soccer. Each country has a team; a world champ is determined in a final playoff. Harry, Hermione and most of the Weasleys attend a final match between Ireland and Bulgaria in GOBLET OF FIRE. The game is attended by 100,000 witches and wizards at a magical stadium unseen by Muggles.

Ravenclaw: One of four student houses at Hogwarts. Named for Rowena Ravenclaw, one of the school’s four founders.

Remembrall: A glass marble ball that turns red when held by its owner if he or she has forgotten something.

Secrecy Sensor: Tool that vibrates when it detects concealment or lies. Moody has one.

Seeker: The key position on a Quidditch team. The Seeker must catch the Golden Snitch before the other team’s Seeker does. When the Snitch is caught, the match ends. Harry plays Seeker for Gryffindor.

Shrieking Shack: A house in Hogsmeade commonly believed to be the most haunted dwelling in Britain ... but is it?

Slytherin: One of four student houses at Hogwarts. Named for Salazar Slytherin, one of the school’s four founders.

Snitch: See "Golden Snitch".

Sorcerer's Stone: Special stone that can change metal into gold and produces the Elixir of Life, which makes the drinker immortal.

Sorting Hat: Tattered, talking wizard's hat, which, when tried on, tells first years which house they will live in at Hogwarts.

S.P.E.W: Society for the Promotion of Elfish Welfare. An organization started by Hermione to get fair treatment for the hard-working house-elves.

Squib: Someone who has no magical powers even though he or she was born into a wizarding family.

The Three Broomsticks: Pub in Hogsmeade, where wizards congregate and Hogwarts students go to drink butterbeer.

Time-Turner: An hourglass-like tool that allows a witch or wizard to travel back in time.

Ton-Tongue Toffee: Magical toffee invented by twins Fred and George Weasley. It makes one's tongue swell to a giant size.

Triwizard Tournament: Year-long magical tournament between three European wizarding schools --- Hogwarts, Beauxbatons, and Durmstrang. One student from each school is chosen to compete, their names selected by the ancient Goblet of Fire. The tournament is held at Hogwarts in GOBLET OF FIRE; it has not been held for centuries, because the death toll was too high.

Unforgiveable Curses: Three cruel curses illegal in the wizarding world. Includes the Imperious Curse, the Cruciatus Curse, and the Killing Curse.

Veritaserum: A powerful Truth Potion.

Weasleys' Wizard Wheezes: Charmed joke items that Fred and George Weasley have invented and want to sell.

Weird Sisters: Band that plays at the Yule Ball, the Hogwarts school dance.

Whomping Willow: A type of tree on the Hogwarts grounds that has the ability to attack with its branches.

Wronski Feint: Daring Quidditch move; on flying broomstick, a player goes into a fast, steep dive.

Yule Ball: Christmas dance held at Hogwarts for fourth-years and older.

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