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a. (in Britain) a police officer ranking between constable and inspector
b. (in the US) a police officer ranking below a captain
3. a court or municipal officer who has ceremonial duties
4. (formerly) a tenant by military service, not of knightly rank



a military rank in the armed forces of the USSR and many other countries. In Russia the rank of sergeant dates from the 17th century in regiments formed on the West European model and in the Russian Army before 1798. In the USSR the ranks of junior sergeant, sergeant, and senior sergeant were introduced in 1940.

References in periodicals archive ?
"I'm a sergeant instructor in the Army Cadets and wanted to show my husband the sights and bridge in Arnhem," said Jean.
Mr Nicholas Gillett, a civilian sergeant instructor and Ministry of Defence driver based at Whittington Barracks, Lichfield, was given 500 rounds from quarter-master stores for a cadet training exercise in May 1996.
The gorilla, named Squadron Quartermaster Sergeant Instructor Gorilla, was said in one letter to have sent his "best military regards".
But she already had a replacement and handed the gorilla - named SQMSIG, standing for Squadron Quartermaster Sergeant Instructor Gorilla - back to Lt Col Pople.