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1. often Crusade Any of the military expeditions undertaken by European Christians in the 11th, 12th, and 13th centuries to recover control of the Holy Land from the Muslims.
2. A holy war undertaken with papal sanction.
3. A concerted effort or vigorous movement for a cause or against an abuse: a crusade for literacy; a crusade against drunk driving.
intr.v. cru·sad·ed, cru·sad·ing, cru·sades
To engage in a crusade.
[French croisade and Spanish cruzada, both ultimately from Latin crux, cruc-, cross.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Government, Politics & Diplomacy) campaigning: a crusading lawyer.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
crusading[kruːˈseɪdɪŋ] adj [journalist, lawyer, newspaper] → militant(e)
Collins English/French Electronic Resource. © HarperCollins Publishers 2005