beefeater noun3 •An African bird of the genus Buphagus, which feeds on the larvae of botflies hatched under the skin of oxen, antelopes, etc. •(historical) A kind of hat worn by women resembling the headwear of a Beefeater (Yeoman Warder). •(no longer used) One who eats beef; a large, plump person; a well-fed servant. formsbeefeaters