(military, US) A non-commissioned officer in the United States Army, ranking above sergeant first class and below sergeant major; equal in grade and pay to a first sergeant.
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(military, US) A non-commissioned officer in the United States Marine Corps, ranking above gunnery sergeant and below master gunnery sergeant or sergeant major.
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(military, US) A non-commissioned officer in the United States Air Force, ranking above technical sergeant and below senior master sergeant.
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