coun·​ter·​com·​plaint | \ ˌkau̇n-tər-kəm-ˈplānt How to pronounce countercomplaint (audio) \
variants: or counter-complaint
plural countercomplaints or counter-complaints

Definition of countercomplaint

: a complaint made in response to another complaint or by a person or group who was complained against The US said it would file a complaint with the new World Trade Organization after 20 months of negotiations with Japan failed to open that country's market to US autos and auto parts. Tokyo said it will file a countercomplaint with the WTO.The Christian Science Monitor specifically, law : counterclaim The defendants filed several affirmative defenses to the complaint and filed a countercomplaint against the plaintiff hospital. Methodist Medical Center v. Taylor

First Known Use of countercomplaint

1657, in the meaning defined above

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The first known use of countercomplaint was in 1657

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