1. 拳击运动员；拳击选手
A boxer is someone who takes part in the sport of boxing.

2. 拳师狗
A boxer is a dog with short hair and a rather flat face.

1. a breed of stocky medium-sized short-haired dog with a brindled coat and square-jawed muzzle developed in Germany

2. someone who fights with his fists for sport

Synonym: pugilist

3. a workman employed to pack things into containers

Synonym: packerbagger