(1):

(n.) A combination of two or more persons to commit an unlawful act, or to do a lawful act by unlawful means. See Conspiracy.

(2):

(n.) With the, the Confederate States of America.

(3):

(n.) A league or compact between two or more persons, bodies of men, or states, for mutual support or common action; alliance.

(4):

(n.) The persons, bodies, states, or nations united by a league; a confederation.