The word "draught" (often spelled "draft" in American English) has several meanings depending on the context. Generally, it refers to a current of air that flows into a room or space. It can also mean a preliminary version of a document or plan, or in British English, it can refer to a serving of drink, especially beer. Additionally, in the context of animals, it can refer to animals, like horses, used for pulling heavy loads.
The word "draught" comes from the Old English "dræge," which means "to pull, drag." The variant spelling "draft" is used primarily in American English.