What does the word guerrilla mean?

a person who engages in irregular warfare especially as a member of an independent unit carrying out harassment and sabotage Please use the correct form of the word "does". The definition of guerrilla is a member of a small group taking part in irregular fighting, typically against larger forces. Examples of guerrilla warfare would include the American Colonists fighting the British Redcoats in the Revolutionary War, the Confederates fighting the large Union army in the Civil war, or the Viet Kong fighting against the U.S.A. in the Vietnam war.