noun

1. A participant (fighter) in a boxing match.

   “You can tell she's a boxer by looking at her nose.”

2. A breed of stocky, medium-sized, short-haired dog with a square-jawed muzzle.

3. A type of internal combustion engine in which cylinders are arranged in two banks on either side of a single crankshaft.

Synonyms: pugilist, boxer engine