fight ‧ er /ˈfaɪtə $ -ər/ BrE AmE noun [countable]
1 . ( also ˈfighter plane/aircraft/jet ) a small fast military plane that can destroy other planes:
He was shot down by enemy fighters.
a fighter pilot
2 . someone who fights, especially as a sport
3 . someone who keeps trying to achieve something in difficult situations:
James is a fighter – he never gives up.
⇨ ↑ firefighter , ↑ freedom fighter