(1):

(v. t.) To loose the bands of; to set free; to disunite; to scatter; to disperse; to break up the organization of; especially, to dismiss from military service; as, to disband an army.

(2):

(v. t.) To divorce.

(3):

(v. i.) To become separated, broken up, dissolved, or scattered; especially, to quit military service by breaking up organization.