D defs.my
Entry 4 senses Webster, 1913

Fighter

/(fīt"ẽr)/ · Fight·er · IPA /ˈfaɪtɚ/
01 n. One who fights; a combatant; a warrior.
  1. 1.
    One who fights; a combatant; a warrior.
  2. 2.
    A boxer; a pugilist.
  3. 3.
    A person with the determination and will to persist through great difficulty to achieve a goal; one with the courage to fight and resist an opponent, and to struggle with all one's powers.
  4. 4.
    A military aircraft designed to seek out and destroy enemy aircraft; it is usually smaller and more maneuvarable than aircraft designed specifically for bombing. However, hybrid fighter-bomber aircraft that perform both functions also are used.(Mil.)