Fleet/fliːt/ Definition 1 of 4Pro Tip 1/3Naval Context Often used to describe groups of military ships in a navy. During the war, the fleet protected the coastline. Pro Tip 2/3Control Implication Implies organization and command, usually by a central authority. The admiral commanded the fleet with precision. Pro Tip 3/3Not just Warships Can refer to any group of ships, not only those used in battle. A merchant fleet was seen docking at the harbor.