The noun passport has 3 senses (no senses from tagged texts)
1. pass, passport -- (any authorization to pass or go somewhere; "the pass to visit had a strict time limit")
2. passport -- (a document issued by a country to a citizen allowing that person to travel abroad and re-enter the home country)
3. recommendation, passport -- (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")