2. Without notice to prepare the mind for the event; sudden; hasty; unceremonious. "The cause of your abrupt departure." Shak.

3. Having sudden transitions from one subject to another; unconnected. The abrupt style, which hath many breaches. B. Jonson.

4. (Bot.)

Defn: Suddenly terminating, as if cut off. Gray.

Syn. — Sudden; unexpected; hasty; rough; curt; unceremonious; rugged; blunt; disconnected; broken.

ABRUPT
Ab*rupt", n. Etym: [L. abruptum.]

Defn: An abrupt place. [Poetic]
"Over the vast abrupt." Milton.

ABRUPT
Ab*rupt", v. t.

Defn: To tear off or asunder. [Obs.] "Till death abrupts them." Sir
T. Browne.

ABRUPTION
Ab*rup"tion, n. Etym: [L. abruptio, fr. abrumpere: cf. F. abruption.]