What is "staff sergeant"

n. 1 A non-commissioned officer in the armed forces of several countries, ranking above a sergeant. (Sometimes abbreviated to "staff"). 2 (context British Army English) A non-commissioned officer in the British Army, ranking above a sergeant and below a warrant officer class 2. 3 (context US Army English) A non-commissioned officer in the United States Army, ranking above sergeant and below sergeant first class. 4 (context US Marines English) A non-commissioned officer in the United States Marine Corps, ranking above sergeant and below gunnery sergeant. 5 (context US Air Force English) A non-commissioned officer in United States Air Force, ranking above senior airman and below technical sergeant.

n. a noncommissioned officer ranking above corporal and below sergeant first class in the army or marines or above airman 1st class in the air force

Staff Sergeant is a rank of non-commissioned officer used in the armed forces of several countries. It is also a police rank in some police services.