Meaning

noun a serving of drink (usually alcoholic) drawn from a keg

noun a large and hurried swallow

noun a current of air (usually coming into a chimney or room or vehicle)

originFrom Middle English draught, draght, draȝt, from Old English *dreaht, *dræht (related to dragan (“to draw, drag”)), from Proto-Germanic *drahtuz, noun form of *draganą; equivalent to draw + -t.

Etymology from Wiktionary, CC BY-SA 3.0