dis·union /(ˌ)dɪsˈjunjən, dɪʃ-/
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 clou░ the happiness of this kingdom. --Clarendon.
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.
n : the termination or destruction of union [ant: union]