ALL meanings of sergeant first class
ser·geant first class
S s - noun sergeant first class a noncommissioned officer ranking next above a staff sergeant and below a first or master sergeant. 1
- noun sergeant first class the seventh most superior rank in the US army, above the rank of staff sergeant and below the rank of master sergeant 0
- noun sergeant first class a noncommissioned officer of the seventh grade, ranking above staff sergeant and below master or first sergeant 0