Definition of platoon sergeant in English:
A noncommissioned officer in the US Army intermediate in rank between a staff sergeant and a first sergeant.
- Mark Sullivan, who played the fearsome platoon sergeant in Lad's Army, is to don his boots and beret again to run in Sunday's New York marathon.
- As the platoon sergeant from Lads' Army, he has become the face of the hit show.
- My head was immersed in a fog, and I couldn't even understand the words coming out of the platoon sergeant's mouth as he pinned my new rank on me.