Merriam-Webster's Collegiate® Dictionary, 11th Edition
MAST
I. noun
Etymology: Middle English, from Old English mæst; akin to Old High German mast mast, Latin malus Date: before 12th century a long pole or spar rising from the keel or deck of a ship and supporting the yards, booms, and rigging, a slender vertical or nearly vertical structure (as an upright post in various cranes), a disciplinary proceeding at which the commanding officer of a naval unit hears and disposes of cases against enlisted men, masted adjective
II. transitive verb
Date: circa 1513
to furnish with a mast,
III. noun see: meat Date: before 12th century nuts (as acorns) accumulated on the forest floor and often serving as food for animals