Definition of passport noun from the Oxford Advanced American Dictionary

      

    passport

     noun
    noun
    NAmE//ˈpæspɔrt//
     
     
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  1. 1 an official document that identifies you as a citizen of a particular country, and that you may have to show when you enter or leave a country a valid passport a United States passport I was stopped as I went through passport control (= where passports are checked). a passport photo
  2. 2passport to something a thing that makes something possible or enables you to achieve something synonym key The only passport to success is hard work.
See the Oxford Advanced Learner's Dictionary entry: passport