A village, the county seat of Otsego County, New York; named for American judge and founder William Cooper. / A town in Wisconsin; named for postmaster Allen Cooper.

plural of Cooper pair

A form of federalism in which national, state, and local governments interact cooperatively and collectively to solve common problems, rather than making separate but similar policies.

plural of cooperativist

The practice of organizing into cooperatives.

Of or related to cooperativism.

An advocate of cooperativism.

plural of Cooper test

plural of Cooper vane

(aviation) A mechanical aerodynamic wedge that prevents the ventral airstair of an aircraft from being lowered during flight.