Bedeutung von “complain” — Learner’s Dictionary

complain

verb [ I ] us uk /kəmˈpleɪn/
Extra Examples
Hundreds of people wrote in to complain.Hundreds of irate passengers have complained to the airline.He complained that a member of staff had been rude to him.Several people have complained about the scheme.Greg complained bitterly about the conditions.

B1 to say that something is wrong or that you are annoyed about something:

Lots of people have complained about the noise.
[ + that ] He's always complaining that nobody listens to him.

(Definition von “complain” aus dem Cambridge Learner's Dictionary © Cambridge University Press)