passport in WordNet English dictionary

1. any authorization to pass or go somewhere
   "the pass to visit had a strict time limit"
   pass  passport 
   
2. any quality or characteristic that gains a person a favorable reception or acceptance or admission
   "her pleasant personality is already a recommendation"; "his wealth was not a passport into the exclusive circles of society"
   recommendation  passport 
   
3. a document issued by a country to a citizen allowing that person to travel abroad and re-enter the home country
   passport