What is Chief?

Chief meaning in Military or Military Slang terminology / glossary / dictionary is:
(U.S.) The familiar form of address for any U.S. Army warrant officer or U.S. Navy and U.S. Coast Guard Chief Petty Officer. Also, a section leader in the U.S. Army, and a familiar term for Chief Master Sergeant, the highest enlisted rank in the U.S. Air Force.


reference: Glossary of military slang