Definition of joint adjective from the Oxford Advanced American Dictionary

      

    joint

     adjective
    adjective
    NAmE//dʒɔɪnt//
     
    [only before noun]
     
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  1.  involving two or more people together a joint account (= a bank account in the name of more than one person, for example a husband and wife) The report was a joint effort (= we worked on it together). They finished in joint first place. They were joint owners of the house (= they owned it together).
  2.  
    adverb The event was organized jointly by students and staff.
See the Oxford Advanced Learner's Dictionary entry: joint