Definition of beef
(Entry 1 of 2)
1 : the flesh of an adult domestic bovine (such as a steer or cow) used as food
2a : an ox, cow, or bull in a full-grown or nearly full-grown state especially : a steer or cow fattened for food quality Texas beeves a herd of good beef
b : a dressed carcass of a beef animal
3 : muscular flesh : brawn
beef
verbbeefed; beefing; beefs
Definition of beef (Entry 2 of 2)
: to increase or add substance, strength, or power to
—usually used with upmoney to beef up its staff of professional economists— John Fischer
: complain always beefing about something
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The first known use of beef was in the 13th century
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