Disunite \Dis`u*nite"\, v. t. [imp. & p. p. {Disunited}; p. pr. & vb. n. {Disuniting}.] 1. To destroy the union of; to divide; to part; to sever; to disjoin; to sunder; to separate; as, to disunite particles of matter. 2. To alienate in spirit; to break the concord of. Go on both in hand, O nations, never be disunited, be the praise . . . of all posterity! --Milton.