Definitions from Wiktionary ( )

▸ noun:  (military, now informal) The commander of a naval squadron or fleet, regardless of formal rank.
▸ noun:  (military) The appointed commander of a navy, regardless of formal title.
▸ noun:  (military) A high rank in the British and American Navies, NATO grade OF-9, equivalent ranks in other navies, in coast guards, etc.
▸ noun:  The commander of a fishing or merchant fleet, particularly (historical, Canada) a captain granted special privileges in exchange for bringing the first ship of a given fishing season to certain harbors in Newfoundland.
▸ noun:  (zoology) Any of several species of nymphalid butterflies of the genera Kaniska, Limenitis and Vanessa.
▸ noun:  (conchology) The shell of the Conus ammiralis; the cone shells of various other species displaying similarly intricate banding.
▸ noun:  (now historical) Synonym of flagship: an admiral's ship in a fleet, the command or largest ship in a naval or commercial fleet.
▸ noun:  (now historical, uncommon) Synonym of emir, a Muslim commander or prince.
▸ noun:  (botany, obsolete) Any of several varieties of pear, the trees which produce them.
▸ noun:  Alternative letter-case form of admiral in its various senses. [(military, now informal) The commander of a naval squadron or fleet, regardless of formal rank.]

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