Dis*un"ion*ist, n. An advocate of disunion, specifically, of disunion of the United States.
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.