The term 'motor cruiser' refers to a type of boat that is powered by an engine and is designed for leisurely cruising. The term can also refer to a type of motor vehicle, such as a car or van, that is used for recreational purposes. The crossword solution for this term is 'LAUNCH, ' which is a verb meaning to set in motion or to propel forward. It is often used in the context of launching a boat, which is the act of putting it into the water and starting its engine.