- the senior noncommissioned officer in a platoon, equivalent to sergeant first class.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for platoon sergeant
Probably the platoon-sergeant knows some words that sound sufficiently like Welsh.
It was on such a dawn as this that poor Jack L——, my platoon-sergeant, was killed.From the St. Lawrence to the Yser with the 1st Canadian brigade
Frederic C. Curry