1 [intransitive] (+ adv./prep.) (of a car, plane, etc.) to travel at a steady speed a light aircraft cruising at 4 000 feet a cruising speed of 50 miles an hour2 [intransitive, transitive] (of a car, etc. or its driver) to drive along slowly, especially when you are looking at or for something + adv./prep. She cruised around the block looking for a parking space. cruise something Taxis cruised the streets, looking for fares.