from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A member of an irregular, usually indigenous military or paramilitary unit operating in small bands in occupied territory to harass and undermine the enemy, as by surprise raids.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A non-official war carried out by small independent groups; a guerrilla war.
  • n. A soldier in a small independent group, fighting against the government or regular forces by surprise raids.
  • adj. Relating to, using, or typical of guerrilla warfare, or its principles of small independent or non-official perpetrators.
  • adj. Relating to, using, or typical of guerrilla marketing.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertaining to, or engaged in, warfare carried on irregularly and by independent bands
  • n. An irregular mode of carrying on war, by the constant attacks of independent bands, adopted in the north of Spain during the Peninsular war.
  • n. 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.

from The Century Dictionary and Cyclopedia

  • n. War carried on by the repeated attacks of independent bands; a system of irregular warfare by means of raids and surprises.
  • n. Properly, a band of independent and generally predatory fighters in a war; now, more commonly, an individual member of such a band.
  • Of or pertaining to guerrillas: as, a guerrilla attack; a guerrilla band.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a member of an irregular armed force that fights a stronger force by sabotage and harassment


Spanish, raiding party, guerrilla force, diminutive of guerra, war, of Germanic origin; see wers- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Spanish guerrilla, diminutive of guerra ("war"). (Wiktionary)



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