Definition of volunteer noun from the Oxford Advanced American Dictionary

      

    volunteer

     noun
    noun
    NAmE//ˌvɑlənˈtɪr//
     
     
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  1. 1 a person who does a job without being paid for it volunteer helpers Schools need volunteers to help children learn to read.
  2. 2 a person who offers to do something without being forced to do it Are there any volunteers to help clean up?
  3. 3a person who chooses to join the armed forces without being forced to join compare conscript
See the Oxford Advanced Learner's Dictionary entry: volunteer