Chief of Staff

  1. the senior officer of the U.S. Army or Air Force, a member of the Joint Chiefs of Staff, responsible to the secretary of a service branch.

  2. (lowercase) the senior or principal staff officer in a brigade or division or higher unit in the U.S. Army or Marine Corps, in a numbered unit in the U.S. Air Force, or in a unit in the U.S. Navy commanded by a rear admiral or one of higher rank.

  1. (lowercase) the senior officer in command of a general staff, especially that of the military forces of a nation.

  2. (lowercase) the head of any staff: the chief of staff for the First Lady.

Origin of Chief of Staff

First recorded in 1880–85

Words Nearby Chief of Staff Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use Chief of Staff in a sentence

  • Pupils of the school often appealed to the Chief-of-Staff and sent in “demands.”

    The Russian Turmoil | Anton Ivanovich Denikin

British Dictionary definitions for Chief of Staff

Chief of Staff

  1. the senior staff officer under the commander of a major military formation or organization

  2. the senior officer of each service of the armed forces

  • Abbreviation: C of S, COS

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