Of or pertaining to a ship or ships, their construction, equipment, management, or use; specifically, of or pertaining to a navy: as, naval architecture; a naval victory; a naval force; a naval station or hospital; naval stores.Possessing a navy: as, a naval power.In the United States, an officer of the Treasury Department who, at the larger maritime ports, is associated with the collector of customs. He assists in estimating duties, countersigns all permits, clearances, certificates, etc., issued by the collector, and examines and certifies his accounts. In the American colonies before the Revolution the naval officer was the administrator of the Navigation Act.Synonyms Marine, Nautical, etc. See maritime.Naval affairs.