Meaning of “defeat” - Learner’s Dictionary

defeat

verb [ T ] uk us /dɪˈfiːt/
WIN

B1 to win against someone in a fight or competition:

She was defeated by an Australian player in the first round of the tournament.
MAKE FAIL

B2 to make someone or something fail:

The bill was narrowly defeated in parliament.

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