master gunnery sergeantmaster gunnery sergeant
- A noncommissioned rank in the US Marine Corps that is above master sergeant and equivalent to the position of sergeant major.
- One who holds this rank.
NounSee also: MGySgt
(plural master gunnery sergeants)
- (military, US) A non-commissioned officer of rank E-9 in the United States Marine Corps, ranking above a master sergeant/first sergeant and below a warrant officer. It is equal in grade to sergeant major