1. One who fights, such as a soldier or boxer.
2. A fast, maneuverable combat aircraft used to engage enemy aircraft.
3. A pugnacious, unyielding, or determined person.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.