'Guerrilla' definitions:

Definition of 'guerrilla'

From: WordNet
noun
A member of an irregular armed force that fights a stronger force by sabotage and harassment [syn: guerrilla, guerilla, irregular, insurgent]

Definition of 'Guerrilla'

From: GCIDE
  • Guerrilla \Guer*ril"la\, n. [Sp., lit., a little war, skirmish, dim. of guerra war, fr. OHG. werra discord, strife. See War.]
  • 1. An irregular mode of carrying on war, by the constant attacks of independent bands, adopted in the north of Spain during the Peninsular war. [1913 Webster]
  • 2. One who carries on, or assists in carrying on, irregular warfare; especially, a member of an independent band engaged in predatory excursions in war time. [1913 Webster]
  • Note: The term guerrilla is the diminutive of the Spanish word guerra, war, and means petty war, that is, war carried on by detached parties; generally in the mountains. . . . A guerrilla party means, an irregular band of armed men, carrying on an irregular war, not being able, according to their character as a guerrilla party, to carry on what the law terms a regular war. --F. Lieder. [1913 Webster]

Definition of 'Guerrilla'

From: GCIDE
  • Guerrilla \Guer*ril"la\, a. Pertaining to, or engaged in, warfare carried on irregularly and by independent bands; as, a guerrilla party; guerrilla warfare. [1913 Webster]

Synonyms of 'guerrilla'

From: Moby Thesaurus