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English definition of “crusade”

crusade

noun [C]  /kruˈseɪd/ us  
a long and determined attempt to achieve something you strongly believe in: She’s involved in the crusade for racial equality. The Crusades world history The Crusades were a series of wars in the 11th, 12th, and 13th centuries fought between Christians from Europe and Muslims in the region around the eastern Mediterranean Sea.
crusade
verb [I]  /kruˈseɪd/ us  
He crusaded tirelessly for civil rights.
crusader
noun [C]  /kruˈseɪ·dər/ us  
a crusader for social justice
(Definition of crusade from the Cambridge Academic Content Dictionary © Cambridge University Press)
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