Draft, a.
1. Pertaining to, or used for, drawing or pulling (as vehicles, loads, etc.). Same as Draught.
2. Relating to, or characterized by, a draft, or current of air. Same as Draught.
Note: The forms draft and draught, in the senses above-given, are both on approved use. Draft box, Draft engine, Draft horse, Draft net, Draft ox, Draft tube. Same as Draught box, Draught engine, etc. See under Draught.
1 other Webster entry under this spelling
Draft, v. t. [imp. & p. p. Drafted; p. pr. & vb. n. Drafting.]
1. To draw the outline of; to delineate.
2. To compose and write; as, to draft a memorial.
3. To draw from a military band or post, or from any district, company, or society; to detach; to select. Some royal seminary in Upper Egypt, from whence they drafted novices to supply their colleges and temples. Holwell.
4. To transfer by draft. All her rents been drafted to London. Fielding.
Shades of meaning
Fernald has no entry of its own for draft; he lists it under sketch.
Where he writes about it:
Draft and plan apply especially to mechanical drawing, of which outline, sketch, and drawing are also used; a plan is strictly a view from above, as of a building or machine, giving the lines of a horizontal section, originally at the level of the ground, now in a wider sense at any height; as, a plan of the cellar; a plan of the attic. — from sketch
A mechanical drawing is always understood to be in full detail; a draft is an incomplete or unfinished drawing; a design is such a preliminary sketch as indicates the object to be accomplished or the result to be attained, and is understood to be original. — from sketch