- Archaic warfare carried on by guerrillas
- any member of a small defensive force of irregular soldiers, usually volunteers, making surprise raids, esp. behind the lines of an invading enemy army
Origin of guerrillaSp, diminutive of guerra, war from French guerre or Italian guerra, both from Frankish an unverified form werra: see war
- of or by guerrillas
- characteristic of guerrillas; undercover, clandestine, etc. or radical, subversive, etc.