Webster's Revised Unabridged Dictionary · 1913

Abrupt

Abrupt ({not transcribed}) , adjective

[Latin abruptus, past participle of abrumpere to break off; ab + rumpere to break. See Rupture.]

1.
Broken off; very steep, or craggy, as rocks, precipices, banks; precipitous; steep; as, abrupt places.
Tumbling through ricks abrupt, — Thomson
2.
Without notice to prepare the mind for the event; sudden; hasty; unceremonious.
The cause of your abrupt departure. — Shakespeare
3.
Having sudden transitions from one subject to another; unconnected.
The abrupt style, which hath many breaches. — B. Jonson
4.
(Botany) Suddenly terminating, as if cut off. — Gray

Abrupt ({not transcribed}) , noun

[Latin abruptum.]

An abrupt place. [Poetic]
“Over the vast abrupt.” — Milton

Abrupt , transitive verb

To tear off or asunder. [Obsolete]
Till death abrupts them. — Sir T. Browne