noun U.S. Army.
the senior noncommissioned officer of a company, squadron, etc., responsible for personnel and administration.
Origin of first sergeant
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for first sergeant
"Every office and ship and retail yard could be run by a first-sergeant," Skinner complained.The Go-Getter|Peter B. Kyne