an officer of very high rank in the navyThe admiral visited the ships under his command.Admiral Lord NelsonWordfindernavyadmiral,aircraft carrier,base,captain,command,fleet,navy,submarine,torpedo,warshipsee alsorear admiral,red admiralOxford Collocations Dictionaryadjectiverear,vicephrasesAdmiral of the Fleet,Fleet AdmiralSeefull entrySee related entries:The navy,People in sea travelWord OriginMiddle English (denoting an emir, a Muslim leader, or Saracen commander): from Old French amiral, admirail, via medieval Latin from Arabic 'amīr ‘commander’ (from 'amara ‘to command’). The ending -al was from Arabic -al- ‘of the’, used in titles (e.g. 'amīr-al-'umarā ‘ruler of rulers’), later assimilated to the familiar Latinate suffix -al.
See admiral in the Oxford Advanced American Dictionary