ad ‧ mi ‧ ral /ˈædm ə rəl/ BrE AmE noun [countable]
[ Date: 1200-1300 ; Language: Old French ; Origin: amiral , from Medieval Latin admirallus , from Arabic amir-al- 'commander of the' (as in amir-al-bahr 'commander of the sea' ) ]
a high rank in the British or US navy, or someone with this rank