Definition of function verb from the Oxford Advanced American Dictionary

        

    function

     verb
    verb
    NAmE//ˈfʌŋkʃn//
     
    [intransitive](+ adv./prep.)Verb Forms present simple I / you / we / they function
     
    he / she / it functions
     
    past simple functioned
     
    -ing form functioning
     
     
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  1. 1  to work in the correct way synonym operate
  2. 2 Despite the power cuts, the hospital continued to function normally. We now have a functioning shower. Many children can't function effectively in large classes.
  3. Phrasal Verbsfunction as somebody/something
See the Oxford Advanced Learner's Dictionary entry: function