|Origin:||, past participle of abrumpere, from ab- 'away, off' + rumpere 'to break'|
sudden and unexpected:
an abrupt change of plan
come to an abrupt end/halt etc
The bus came to an abrupt halt.
seeming rude and unfriendly, especially because you do not waste time in friendly conversation:
Sorry, I didn't mean to be so abrupt.
—abruptness noun [uncountable]