|Noah Webster's Dictionary|
1. (n.) A separation or disjunction of relations or interests; as, the disunion of the body and the soul.
2. (n.) A breach of concord and its effect; alienation.
3. (n.) The termination or disruption of the union of the States forming the United States.
Disunion (1 Occurrence)
1 Corinthians 12:25 that there might be no disunion in the body, but that all the members might entertain the same anxious care for one another's welfare. (WEY)