American English

Definition of cooperate verb from the Oxford Advanced American Dictionary

      

    cooperate

     verb
    verb
    NAmE//koʊˈɑpəˌreɪt//
     
    Verb Forms present simple I / you / we / they cooperate
     
    he / she / it cooperates
     
    past simple cooperated
     
    -ing form cooperating
     
     
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  1. 1[intransitive] cooperate (with somebody) (in/on something) to work together with someone else in order to achieve something The two groups agreed to cooperate with each other. They had cooperated closely in the planning of the project.
  2. 2[intransitive] cooperate (with somebody) (in/on something) to be helpful by doing what someone asks you to do Their captors told them they would be killed unless they cooperated.
See the Oxford Advanced Learner's Dictionary entry: cooperate