- a member of a band of irregular soldiers that uses guerrilla warfare, harassing the enemy by surprise raids, sabotaging communication and supply lines, etc.
- pertaining to such fighters or their technique of warfare: guerrilla strongholds;guerrilla tactics.
- of or relating to an unauthorized, edgy, or disruptive version of an activity: guerrilla filmmaking on a busy sidewalk;guerilla gardening to beautify an abandoned lot.
- a member of an irregular usually politically motivated armed force that combats stronger regular forces, such as the army or police
- (as modifier)
- a form of vegetative spread in which the advance is from several individual rhizomes or stolons growing rapidly away from the centre, as in some clovers
