Meaning of “cooperate” - Learner’s Dictionary

cooperate

verb [ I ] ( also UK co-operate) uk us /kəʊˈɒpəreɪt/
WORK TOGETHER

B2 to work together with someone in order to achieve the same aim:

Witnesses are cooperating with detectives.
Several countries are cooperating in the relief effort.
HELP

B2 to help someone or do what they ask:

We can get there early as long as the children will cooperate.

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