Definitions of boxer:

noun: a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany
noun: someone who fights with his fists for sport
noun: a member of a nationalistic Chinese secret society that led an unsuccessful rebellion in 1900 against foreign interests in China
noun: a workman employed to pack things into containers
name: A surname (very rare: popularity rank in the U.S.: #21034)