• synonyms

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

Origin of Chief of Staff

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for chief of staff

Contemporary Examples of chief of staff

Historical Examples of chief of staff

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
Show More
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