accio - Causes an object to fly to the caster, even over quite some distance; the target object is said to have been Summoned. It would seem that the caster must know at least the general location of the object Summoned.

age line - A thin golden line drawn on a floor, which affects anyone who crosses it if they are too young. (Presumably, an Age Line could also be set up to prevent someone to cross who was older than a given age.)

aguamenti - Charm that conjures a fountain or jet of clear water from the caster's wand.

alohomora - Charm that causes a locked door to open.

anapneo - Spell that clears the target's airway, if blocked.

animagus transfiguration - The Transfiguration by which an Animagus takes his or her animal form, or reverts to human form from animal form. The animal form is sometimes referred to as the witch or wizard's Animagus form.

anti-apparition - Prevents someone from Apparating.

anti-cheating spell - Cast on quills before exams.

anti-disapparition jinx - Prevents someone from Apparating.

anti-gravity mist - Charm which creates an innocent-looking mist which hovers above the ground. A person stepping into this mist immediately finds that up and down have reversed and they are hanging from the ground over the endless sky.

anti jinx - See jinxes.

antler jinx - Causes the victim to sprout antlers.

aparecium - Makes invisible ink become visible.

apparition - Advanced spell used by fully trained witches and wizards to disappear from one place and appear almost instantly somewhere else. A person who uses this spell is referred to as an Apparator.

apparition, side-along - A form of Apparition in which the Apparator touches someone else, such as a child too young to Apparate, and Apparates with that person as a "passenger".

armour-bewitching charm - Bewitches a suit of armour to sing Christmas carols.

arrows, wand - Shoots arrows out of a wand.

atmospheric charm - Something to do with weather effects such as are seen at Ministry of Magic headquarters in London.

avada kedavra - Causes instant death in a flash of green light, usually leaving no sign of physical damage or of the cause of death that would be detectable to a Muggle autopsy.

avis - Conjures a flock of small, twittering birds.