staff sergeant
noun
Definitions
A non-commissioned officer in the armed forces of several countries, ranking above a sergeant. (Sometimes abbreviated to "staff").
A non-commissioned officer in the British Army, ranking above a sergeant and below a warrant officer class 2.
A non-commissioned officer in the United States Army, ranking above sergeant and below sergeant first class.
(Marines) A non-commissioned officer in the United States Marine Corps, ranking above sergeant and below gunnery sergeant.