Meaning of “abrupt” in the English Dictionary

"abrupt" in British English

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abruptadjective

uk /əˈbrʌpt/ us /əˈbrʌpt/

abrupt adjective (SUDDEN)

C2 sudden and unexpected, and often unpleasant:

an abrupt change/movement
Our conversation came to an abrupt end when George burst into the room.
The road ended in an abrupt (= sudden and very steep) slope down to the sea.

More examples

abruptly
adverb uk /əˈbrʌpt.li/ us /əˈbrʌpt.li/

The talks ended abruptly when one of the delegations walked out in protest.
abruptness
noun [ U ] uk /əˈbrʌpt.nəs/ us /əˈbrʌpt.nəs/

(Definition of “abrupt” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"abrupt" in American English

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abruptadjective

us /əˈbrʌpt/

abrupt adjective (SUDDEN)

sudden and not expected, often with unpleasant results:

There was an abrupt change in her mood.
We came to an abrupt curve in the road.

abrupt adjective (NOT FRIENDLY)

not friendly or polite; showing little interest in talking to other people:

His abrupt manner makes me uncomfortable.
abruptly
adverb us /əˈbrʌp·tli/

They abruptly left the party.

(Definition of “abrupt” from the Cambridge Academic Content Dictionary © Cambridge University Press)