Cruiser

(plural cruisers)

(nautical, in the days of sail) A frigate or other vessel, detached from the fleet, to cruise independently in search of the enemy or its merchant ships.
(nautical) A class of fast warships of medium tonnage, having a long cruising range but less armour and firepower than a battleship.
(nautical) A miniature aircraft carrier carrying VTOL aircraft.
(nautical) A passenger ship used for pleasure voyages, where the voyage itself and the ship's amenities are considered an essential part of the experience; also cruise ship.
(nautical) Any of several yachts designed for cruising.
(US, law enforcement) A police patrol vehicle.
One who attends cruises.