[master sergeant] n (ca. 1934): a noncommissioned officer ranking in the army above a sergeant first class and below a staff sergeant major, in the air force above a technical sergeant and below a senior master sergeant, and in the marine corps above a gunnery sergeant and below a master gunnery sergeant
MASTER SERGEANT
Meaning of MASTER SERGEANT in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012