1.(document)护照
You should take your passport with you when changing money.换钱时, 你应当随身带上护照。
a South African businessman travelling on a British passport一个持英国护照旅行的南非商人
2.a passport to sth or the passport to sth
(advantage)…的保障；…的通行证
Victory would give him a passport to the riches he craves.胜利将给他带来他所渴望的财富。
If the interview goes well, it could be the passport to an exciting new career.如果这个面试进展顺利, 可能会成为激动人心的全新职业生涯的通行证。
A good education is the passport to success.好的教育是成功的保障。
3.(licence)过境许可证