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Webster's Dictionary (1865)

Dis-ūn'ion, n.

noun

(dis-yun'yun), n. [Prefix dis and union; It. disunione, Fr. désunion.]

  1. The termination of union; separation; disjunction.
  2. A breach of concord and its effect; contention; alienation; conflict.

Such a disunion between the two houses as might cloud the happiness of this kingdom. Clarendon. 3. The severance by any State of its connection with the federal government. [U. S.] I have not accustomed myself to hang over the precipice of disunion. D. Webster.