Definition of forty-niner noun from the Oxford Advanced Learner's Dictionary

     

    forty-niner

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1any of the people who went to California to look for gold during the Gold Rush of 1849.
  2. 2the Forty-Niners [plural] the popular name for the San Francisco professional football team.