a ship built to carry passengers

a ship A ship is a large, usually decked watercraft

a ship intended for the transport of more than twelve passengers

a ship which carries more than twelve passengers

a passenger ship that its authorized to carry over twelve passengers.

A passenger ship is a ship whose primary function is to carry passengers. The category does not include cargo vessels which have accommodations for limited numbers of passengers, such as the ubiquitous twelve-passenger freighters once common on the seas in which the transport of passengers is secondary to the carriage of freight. The type does however include many classes of ships which are designed to transport substantial numbers of passengers as well as freight.