chief of staff

noun phrase

Definition of chief of staff 

1 : the ranking officer of a staff in the armed forces serving as principal adviser to a commander

2 : the ranking officer of the army or air force and a member of the Joint Chiefs of Staff

First Known Use of chief of staff

1862, in the meaning defined at sense 1

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The first known use of chief of staff was in 1862

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the figure or shape of a crescent moon

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