Dictionary

first sergeant

noun

Definition of FIRST SERGEANT

1
:  a noncommissioned officer serving as the chief assistant to the commander of a military unit (as a company or squadron)
2
:  the rank of a first sergeant; specifically :  a rank in the army above a sergeant first class and below a sergeant major and in the marine corps above a gunnery sergeant and below a master gunnery sergeant

First Known Use of FIRST SERGEANT

circa 1860

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