English English Wikipedia has an article on:fleet admiralWikipedia Alternative forms FADM Noun fleet admiral (plural fleet admirals) (military, historical) The highest rank in the United States Navy, NATO grade OF-10, used only during World War II. The last commissioned fleet admiral was William Halsey in 1945. The last to hold the rank was Chester Nimitz, who died 20 February 1966. Synonyms admiral of the fleet (dated); admiral of the navy (historical) Coordinate terms general of the army (US Army) admiral of the fleet (UK) Translations top rank in the US Navy — see also admiral, admiral of the fleet Finnish: laivastoamiraali (fi) Greek: αρχιναύαρχος (el) m (archinávarchos) Polish: admirał floty m References Fleet Admiral (United States) (US Navy) US Navy ranksWikiwand - on Seamless Wikipedia browsing. On steroids.