What is a valid passport?

A valid Passport is a piece of government photo identification that will allow you to travel internationally as it is only available to citizens of the country issuing it. Some countries also require a visa in order for you to enter. The valid portion just means that the passport is current (not expired). Be aware that passports are now required to travel to the US from Canada and vice versa. You need several pieces of government documentation in order to prove your citizenship (birth certificate, gov't photo id such as a driver's license etc ).