Chief of Staff



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.
(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.
(lowercase) the senior officer in command of a general staff, especially that of the military forces of a nation.
(lowercase) the head of any staff: the chief of staff for the First Lady.

Origin of Chief of Staff

First recorded in 1880–85 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for chief of staff

Contemporary Examples of chief of staff

  • He was a hard-nosed realist with impeccable military credentials: Palmach hero, IDF Chief-Of-Staff and Defense Minister.

    The Daily Beast logo
    Netanyahu's Studied Ambiguity

    Paul Gross

    January 21, 2013

Historical Examples of chief of staff

British Dictionary definitions for chief of staff

Chief of Staff


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