noun.
A contract between two or more persons, bodies of men, or states, for mutual support or joint action of any kind; a compact, league, or alliance.
noun.
An aggregation of persons, parties, states, or nations united by a league; a confederation.
noun.
In law, a combination of two or more persons to commit an unlawful act; a conspiracy.
noun.
Confederated action; coöperation; concurrence.