Severus Snape is the Potions Master and Head of Slytherin House when Harry begins his studies at Hogwarts.

Tom Marvolo Riddle is the birth name of Lord Voldemort, which he used to create his first Horcrux.

The Daily Prophet is the primary newspaper of the British wizarding community.

Fluffy was a large, three-headed dog owned by Hagrid that guarded the trapdoor leading to the Philosopher's Stone.

Dobby was the Malfoy family's house-elf before he was freed by Harry Potter.

The Marauder's Map was created by Remus Lupin, Peter Pettigrew, Sirius Black, and James Potter during their time at Hogwarts.

Sectumsempra is a curse created by Severus Snape, but it is not one of the three officially recognized Unforgivable Curses.

Alohomora is the Unlocking Charm, used to open doors and windows.

Remus Lupin, the Defense Against the Dark Arts professor, teaches Harry the Patronus Charm to protect him from Dementors.

The Mirror of Erised shows the viewer their heart's greatest desire.

Expelliarmus is the Disarming Charm, a staple of Harry Potter's dueling technique.

Hogsmeade is the only all-wizarding village in Britain and is located near Hogwarts.

A Squib is a person born to magical parents but who has no magical abilities.

The badger is the animal symbol of Hufflepuff House, known for its tenacity.

Felix Felicis is a potion that makes the drinker lucky for a period of time.

Harry's wand has a phoenix feather core, from the same phoenix that provided a feather for Voldemort's wand.

The Sword of Gryffindor was not a Horcrux, but it was used by Harry Potter and Neville Longbottom to destroy two of them.

The Mirror of Erised shows the viewer their deepest, most desperate desires.

Armando Dippet was the headmaster of Hogwarts before Albus Dumbledore took over the position.

A Time-Turner is a device used to travel back in time, allowing Hermione to manage her demanding class schedule.

Azkaban is the heavily fortified wizarding prison located on an island in the North Sea.

Nearly Headless Nick, officially Sir Nicholas de Mimsy-Porpington, is the ghost of Gryffindor House.

Quidditch is the most popular sport in the wizarding world, played on broomsticks with four balls.

A Hippogriff is a magical beast with the head, wings, and forelegs of an eagle and the body, hind legs, and tail of a horse.

Diagon Alley is the main shopping area in London for the wizarding community