passport

/ˈpɑːspɔːt/noun

An official travel document that confirms who you are and what country you belong to, used mainly for trips abroad.

Example sentence

“Check that your passport hasn't expired before booking the trip.”

Figuratively, a passport to something is whatever grants entry: education as a passport to opportunity.

Related words

luggageThe suitcases and bags a traveller uses to carry their belongings.airportA place where aircraft take off and land, with one or more runways and, for commercial flights, passenger terminals.ticketA small slip or card that serves as proof of payment or permission, often allowing the holder to do or attend something.hotelA business, usually a large building and often part of a chain, where travelers pay to sleep and receive services such as meals.flightThe action or ability of moving through the air.journeyA trip from one place to another, thought of as a single complete unit of travel.