united in a league; allied by treaty; engaged in a confederacy; banded together; allied.-of or pertaining to the government of the eleven southern states of the united states which (1860-1865) attempted to establish an independent nation styled the confederate states of america; as, the confederate congress; confederate money.-one who is united with others in a league; a person or a nation engaged in a confederacy; an ally; also, an accomplice in a bad sense.-a name designating an adherent to the cause of the states which attempted to withdraw from the union (1860-1865).-to unite in a league or confederacy; to ally.-to unite in a league; to join in a mutual contract or covenant; to band together.