<p><strong>Noun</strong></p><ul><li>the whole body of warships and auxiliaries belonging to a country or ruler.</li><li>(often initial capital letter) the complete body of such warships together with their officers and enlisted personnel, equipment, yards, etc., constituting the sea power of a nation.</li><li>(often initial capital letter) the department of government charged with its management.</li><li>navy blue (def 1).</li><li>Archaic. a fleet of ships.</li></ul><p><strong>Adjective</strong></p><ul><li>belonging or connected to a navy; naval: navy vessels in the harbor; a navy officer with combat experience aboard a submarine.</li><li>of the color navy blue: Either tie will look great with your navy suit.</li></ul>