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Definition of complainant noun from the Oxford Advanced Learner's Dictionary

complainant

noun

/kəmˈpleɪnənt/

/kəmˈpleɪnənt/

(also more frequent plaintiff)

(law)

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a person who makes a formal complaint against somebody in courtTopics Law and justicec2
Word Originlate Middle English: from French complaignant, present participle of complaindre ‘to lament’, from medieval Latin complangere ‘bewail’, from Latin com- (expressing intensive force) + plangere ‘to lament’.

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See complainant in the Oxford Advanced American DictionarySee complainant in the Oxford Learner's Dictionary of Academic English

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