master sergeant

/M AE1 S T ER0 S AA1 R JH AH0 N T/
noun
  1. 1

    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.

  2. 2

    A non-commissioned officer in the United States Marine Corps, ranking above gunnery sergeant and below master gunnery sergeant or sergeant major.

  3. 3

    A non-commissioned officer in the United States Air Force, ranking above technical sergeant and below senior master sergeant.

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Source: https://en.wiktionary.org/wiki/master%20sergeant