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Any of the military expeditions undertaken by European Christians in the 11th, 12th, and 13th centuries to recover the Holy Land from the Muslims.
(noun)
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A holy war undertaken with papal sanction.
(noun)
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A vigorous concerted movement for a cause or against an abuse. See Synonyms at campaign.
(noun)
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To engage in a crusade.
(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.