Meaning of “crow” - Learner’s Dictionary

crow

verb [ I ] uk us /krəʊ/
SPEAK

to talk in a proud and annoying way about something you have done:

Donald wouldn't stop crowing about his exam results.
LOUD NOISE

If a cock (= male chicken) crows, it makes a loud noise, usually in the early morning.

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