A draught is a type of magical liquid, generally intended to be drunk, that produces a specific magical effect on the drinker. In the wizarding world, the term is often used interchangeably with Potions. The fact that draughts like the Draught of Living Death and Draught of Peace are taught in Potions class and appear in textbooks such as Advanced Potion-Making confirms that they are a classification within the broader art of Potion-making. The word “draught” itself implies a quantity of liquid to be drunk in one go. While many concoctions are simply called “potions,” specific, often complex, recipes are frequently referred to as draughts.
Draughts play a significant role in demonstrating the complexity, subtlety, and danger of Potion-making. They often serve as key challenges in Potions classes, allowing students like Harry Potter and Hermione Granger to showcase their magical talent. The Draught of Living Death is particularly pivotal, as Harry's success in brewing it is what earns him the Felix Felicis that proves crucial in obtaining a memory from Horace Slughorn. The existence of different draughts illustrates the vast range of effects that Potions can have, from simple remedies to powerful and dangerous concoctions that can mimic death itself.
The terms “draught” and “potion” are used almost synonymously in the books. “Draught” is an older English word for “a drink” or “a dose,” and its use in the series lends a historical and slightly more formal tone to the world of Potion-making, particularly for specific, named concoctions taught at higher levels.