Fighter has a number of meanings:

• A fighter aircraft is a warplane designed to destroy other warplanes in combat.
• A fighter is one of the basic classes in the RPG Dungeons & Dragons. Fighters are warriors who specialize in the use of weapons.
• A fighter or warrior is a person habitually engaged in combat.
• Fighter: The True Story of the Battle of Britain is a book by Len Deighton.
• A fighting game; a genre of videogames.