Definition of admirals:
(n) :
(military) A high rank in the British and American Navies, NATO grade OF-9, equivalent ranks in other navies, in coast guards, etc.
(n) :
(military) The appointed commander of a navy, regardless of formal title.
(n) :
(military, now informal) The commander of a naval squadron or fleet, regardless of formal rank.
(n) :
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.
(n) :
Any of several species of nymphalid butterflies of the genera Kaniska, Limenitis and Vanessa.
(n) :
(conchology) The shell of the Conus ammiralis; the cone shells of various other species displaying similarly intricate banding.