Definition of beefeaters:
(n) :
(informal, British) A Yeoman Warder
(n) :
An African bird of the genus Buphagus, which feeds on the larvae of botflies hatched under the skin of oxen, antelopes, etc.
(n) :
(obsolete) One who eats beef; a large, plump person; a well-fed servant.
(n) :
(historical) A kind of hat worn by women resembling the headwear of a Beefeater (Yeoman Warder).
(n) :
Alternative letter-case form of Beefeater. [(informal, British) A Yeoman Warder]