Definition of “crusade” - English Dictionary

“crusade” in British English

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crusadenoun

uk /kruːˈseɪd/ us /kruːˈseɪd/

[ C ] a long and determined attempt to achieve something that you believe in strongly:

They have long been involved in a crusade for racial equality.
a moral crusade against drugs

[ C often plural ] also Crusade one of the religious wars (= crusades) fought by Christians, mostly against Muslims in Palestine, in the 11th, 12th, 13th, and 17th centuries

crusadeverb [ I ]

uk /kruːˈseɪd/ us /kruːˈseɪd/

to make an effort to achieve something that you believe in strongly:

She crusaded against sex and violence on television.

(Definition of “crusade” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“crusade” in American English

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crusadenoun [ C ]

us /kruˈseɪd/

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 ] us /kruˈseɪd/

He crusaded tirelessly for civil rights.
crusader
noun [ C ] us /kruˈseɪ·dər/

a crusader for social justice

(Definition of “crusade” from the Cambridge Academic Content Dictionary © Cambridge University Press)