admiral

n. naval commander

Admiral is the rank, or part of the name of the ranks, of the highest naval officers. It is usually considered a full admiral (equivalent to full general) and four-star rank above Vice Admiral and below Admiral of the Fleet/Fleet Admiral.
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Noun
1. the supreme commander of a fleet; ranks above a vice admiral and below a fleet admiral
(synonym) full admiral
(hypernym) flag officer
(hyponym) Bligh, William Bligh, Captain Bligh
2. any of several brightly colored butterflies
(hypernym) nymphalid, nymphalid butterfly, brush-footed butterfly, four-footed butterfly

n. admiral, naval commander

(n.)
The ship which carries the admiral; also, the most considerable ship of a fleet.
  

(n.)
A naval officer of the highest rank; a naval officer of high rank, of which there are different grades. The chief gradations in rank are admiral, vice admiral, and rear admiral. The admiral is the commander in chief of a fleet or of fleets.
  

(n.)
A handsome butterfly (Pyrameis Atalanta) of Europe and America. The larva feeds on nettles.