Noun
The copilot of an aircraft.
The chief mate of a merchant ship.
The executive officer, second in command of a naval vessel.
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.
Air Transport Auxiliary rank corresponding to Flight Lieutenant in the Royal Air Force.
Women's Royal Naval Service rank corresponding to Lieutenant-Commander in the Royal Navy.
Source: en.wiktionary.orgAccording to the official accident report, after the first officer made his initial rudder pedal input, he made a series of alternating full rudder inputs. Source: Internet
According to the Pocket Books novels set after the Nemesis, Worf takes over William T. Riker's position of first officer aboard the Enterprise-E. Source: Internet
As of 2385 in the novel miniseries Star Trek: The Fall, Worf continues to remain as first officer of the Enterprise-E. Source: Internet
Ayers (2006): p. 305 In the second book, Enemy of my Enemy, Chakotay is replaced by a Founder who was previously pretending to be his first officer. Source: Internet
Discovery ignores its own chain of command — and all logical sense — in making Ensign Sylvia Tilly its new first officer in "Unification III." Source: Internet
An all-original novel based upon the explosive new series on CBS All AccessAboard the Starship Shenzhou, Lieutenant Michael Burnham, a human woman raised and educated among Vulcans, is promoted to acting first officer. Source: Internet