fighter-n; 3 Senses

Sense Number 1: a combatant, e.g., soldier or boxer

Commentary: FIGHTER[+person][+combatant][+soldier/+boxer] [+role][+combatant]
NOTE: implies physical combat with another person or persons

Examples:
The insurgents have been recruiting fighters from neighboring countries.
He will go up against a younger fighter at Madison Square Garden.
The two fighters circled the ring, watching for weaknesses in the other.
The fighters in the south have not agreed to lay down their weapons.

Mappings:

Sense Number 2: a type of military aircraft

Commentary: FIGHTER[+machine][+aircraft][+military][+combat]

Examples:
The fighter was downed by enemy fire, but the crew parachuted to safety.
This stealth fighter is invisible to radar.
The fighters scrambled during a training exercise. (took off)
Three fighter jocks walked into the bar. (pilots who fly fighter aircraft)

Mappings:
WordNet 3.0 Sense Numbers: 2

Sense Number 3: a pugnacious or determined person

Commentary: FIGHTER[+person][+determined]
NOTE: implies personal determination or passionate advocacy

Examples:
The medical diagnosis is poor but she is a real fighter.
He's known as a fighter when he gets behind in a golf game.
Mary has been a tireless fighter for animal rights.

Mappings:
WordNet 3.0 Sense Numbers: 3