- 1 [countable] a group of military ships commanded by the same person a fleet of destroyers Admiral Chester Nimitz commanded the U.S. Pacific fleet in World War II.
- 2[countable] a group of ships fishing together a fishing/whaling fleet
- 3 the fleet [singular] all the military ships of a particular country a reduction in the size of the American fleet
- 4[countable] fleet (of something) a group of planes, buses, taxis, etc. traveling together or owned by the same organization the company's new fleet of vans