a person who travels to a foreign country to engage in a war on the side of some polity other than their native country (which may or may not be engaged in that war)

A firefighter trained in fighting wildfires.

(military, aircraft) Alternative spelling of fighter-bomber

Alternative form of streetfighter

Alternative form of crimefighter

Alternative form of crimefighter

Alternative spelling of prizefighter

Alternative form of firefighter

Alternative form of stickfighter

(aircraft, military) A military aircraft primarily designed to attack enemy aircraft. Frequently shortened to fighter.