Definitions for "Staff Sergeant"
A noncommissioned officer in the U.S. Army, ranking above Sergeant and below Sergeant First Class.
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
A senior non-commissioned officer rank appointed to assist in performing special duties, trades, or controls within a regiment. For example sergeants employed at a senior level as instructors, farriers, or armourers would be staff sergeants in the British Army.
a NCO (Non-commissioned Officer)
an NCO, stupid