First officer

noun

Definitions

Noun
  1. 1
    The copilot of an aircraft.
  2. 2
    The chief mate of a merchant ship.
  3. 3
    The executive officer, second in command of a naval vessel.
  4. 4
    The most senior civil servant in the United States Foreign Service, with responsibility for running an embassy under the authority of and reporting to the ambassador.
  5. 5
    Air Transport Auxiliary rank corresponding to Flight Lieutenant in the Royal Air Force.
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  1. 6
    Women's Royal Naval Service rank corresponding to Lieutenant-Commander in the Royal Navy.

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