Meaning of “collaborate” - Learner’s Dictionary

collaborate

verb [ I ] uk us /kəˈlæbəreɪt/
WORK TOGETHER

When two or more people collaborate, they work together to create or achieve the same thing:

Didn't you collaborate with him on one of your books?
HELP ENEMY

to help people who are an enemy of your country or government:

He was accused of collaborating with the enemy.
collaborator noun [ C ]

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