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Meaning of crusade

cru•sade

Pronunciation: (kr-sād'), [key]
— n., v., -sad•ed, -sad•ing.
—n.
  1. (often cap.) any of the military expeditions undertaken by the Christians of Europe in the 11th, 12th, and 13th centuries for the recovery of the Holy Land from the Muslims.
  2. any war carried on under papal sanction.
  3. any vigorous, aggressive movement for the defense or advancement of an idea, cause, etc.: a crusade against child abuse.
—v.i.
  1. to go on or engage in a crusade.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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