/kə'læbəreɪt; kə`læbə,ret/
v [I, Ipr]
1 ~ (with sb) (on sth) work together (with sb), esp to create or produce sth （与某人）合作; 协作（尤指创造或生产某事物）
*She collaborated with her sister/She and her sister collaborated on a biography of their father. 她和姐姐合作写父亲的传记.
2 ~ (with sb) (derog 贬) help enemy forces occupying one's country 通敌; 勾结敌人
*He was suspected of collaborating (with the enemy). 怀疑他（与敌人）勾结.

v [I]
[Date: 1800-1900; Language: Late Latin;Origin: , past participle of collaborare, from Latin com- ( COM-) + laborare 'to work']
to work together with a person or group in order to achieve something, especially in science or art
→collaboratorcollaborate on
　The two nations are collaborating on several satellite projects.
collaborate with
　During the late seventies, he collaborated with the legendary Muddy Waters.
collaborate to do sth
　Researchers are collaborating to develop the vaccine.
collaborate in (doing) sth
　Elephants collaborate in looking after their young.
to help a country that your country is fighting a war with, especially one that has taken control of your country
→collaboratorcollaborate with
　Vigilantes began combing the city for anyone known to have collaborated with the enemy.