Chief of Staff
noun
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
Example sentences from the Web for chief of staff
British Dictionary definitions for chief of staff
Chief of Staff
noun
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