Collins COBUILD Advanced Learner's English Dictionary - passport

(passports) 1. Your passport is an official document containing your name, photograph, and personal details, which you need to show when you enter or leave a country. You should take your passport with you when changing money. ...a South African businessman travelling on a British passport. N-COUNT 2. If you say that a thing is a passport to success or happiness, you mean that this thing makes success or happiness possible. Victory would give him a passport to the riches he craves... N-COUNT: N to n