Disunion, n.
Etymology: [Pref. dis- + union: cf. F. désunion.]
1. The termination of union; separation; disjunction; as, the disunion of the body and the soul.
2. A breach of concord and its effect; alienation. Such a disunion between the two houses as might much clouClarendon.
3. The termination or disruption of the union of the States forming the United States. I have not accustomed myself to hang over the precipice of disunion. D. Webster.