first sergeant
noun
1
: a noncommissioned officer serving as the chief assistant to the commander of a military unit (such 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
Cite this Entry
“First sergeant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first%20sergeant. Accessed 8 Jul. 2026.
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