Learner's definition of ABRUPT
[more abrupt; most abrupt]
very sudden and not expected
There was an abrupt change in the weather.
The road came to an abrupt end.
The storm caused an abrupt power failure.
talking to other people in a very brief and unfriendly way
The party ended abruptly when the police arrived.
She turned abruptly and walked away.
The land dropped off abruptly.