Definition of volunteer verb from the Oxford Advanced Learner's Dictionary

      

    volunteer

     verb
    verb
    BrE BrE//ˌvɒlənˈtɪə(r)//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪr//
     
    Verb Forms present simple I / you / we / they volunteer
    BrE BrE//ˌvɒlənˈtɪə(r)//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪr//
     
    he / she / it volunteers
    BrE BrE//ˌvɒlənˈtɪəz//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪrz//
     
    past simple volunteered
    BrE BrE//ˌvɒlənˈtɪəd//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪrd//
     
    past participle volunteered
    BrE BrE//ˌvɒlənˈtɪəd//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪrd//
     
    -ing form volunteering
    BrE BrE//ˌvɒlənˈtɪərɪŋ//
     
    ; NAmE NAmE//ˌvɑːlənˈtɪrɪŋ//
     
     
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  1. 1[intransitive, transitive] to offer to do something without being forced to do it or without getting paid for it volunteer to do something Jill volunteered to organize a petition. volunteer (for/as something) Several staff members volunteered for early retirement. volunteer something (for/as something) He volunteered his services as a driver.
  2. 2[transitive] volunteer something | + speech to suggest something or tell somebody something without being asked to volunteer advice
  3. 3[intransitive] volunteer (for something) | volunteer to do something to join the army, etc. without being forced to to volunteer for military service
  4. 4[transitive] volunteer somebody (for/as something) | volunteer somebody to do something to suggest somebody for a job or an activity, even though they may not want to do it They volunteered me for the job of interpreter.
  5. Word Origin late 16th cent. (as a noun, with military reference): from French volontaire ‘voluntary’. The change in the ending was due to association with -eer.Extra examples Barbara Forrest has kindly volunteered to lead a guided walk to Bolton Abbey. Barbara has kindly volunteered to lead the session. David graciously volunteered to model for the art class. I volunteered for service in the Air Force. We volunteered as witnesses. Nobody asked her, and she didn’t volunteer any information.
See the Oxford Advanced American Dictionary entry: volunteer