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first officer

American  
first officer British  

noun

  1. another name for first mate

  2. the member of an aircraft crew who is second in command to the captain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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The captain and his first officer were taken into police custody in early October before returning to sea.

From Barron's Feb. 23, 2026

She knelt in front of the first officer she saw, told him she’d fled the colectivos, and pleaded for a chance to seek asylum.

From Slate Jan. 15, 2026

On the first two legs, he and first officer Eric Tellman noticed a dirty sock-like smell—an indicator of a fume event—spreading through the Airbus A319 just as they started their descent.

From The Wall Street Journal Dec. 22, 2025

She was the first officer to pursue the defendant down the alleyway.

From BBC Jun. 10, 2025

The first officer must have thought long and hard before making that comment.

From "Outliers" by Malcolm Gladwell

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