Meaning of “coup” - Learner’s Dictionary

coup

noun [ C ] uk us /kuː/
TAKE CONTROL ( also coup d'état, uk /ˌkuːdeɪˈtɑː/ us )

an occasion when a group of people suddenly takes control of a country using force:

a military coup
ACHIEVEMENT

an important achievement, often one that was not expected:

The award is a major coup for the university.

(Definition of “coup” from the Cambridge Learner’s Dictionary © Cambridge University Press)