Passport (noun)

1. An official document issued by a government, certifying the holder's identity and citizenship and allowing them to travel internationally.
2. A document that allows the holder to pass through the border of a country.

Origin:

From the middle english passeport, from old french passeport, from passer "to pass" + port "port".

Examples:

1. I need to renew my passport before my trip next month.
2. He was denied entry into the country because his passport had expired.
3. The passport control officer checked my documents before allowing me to enter the country.
4. She always keeps her passport in a safe place when traveling abroad.
5. You need a valid passport to travel to most foreign countries.