fighter

noun

1. a boxer; pugilist.
2. Military. an aircraft designed to seek out and destroy enemy aircraft in the air and to protect bomber aircraft.
3. a person who fights, struggles, resists, etc.
4. a person with the will, courage, determination, ability, or disposition to fight, struggle, resist, etc.
5. an animal, as a dog, trained to fight or having the disposition to fight.

noun

1. a person who fights, esp a professional boxer
2. a person who has determination
3. military an armed aircraft designed for destroying other aircraft