From Longman Dictionary of Contemporary Englishwarrant officerˈwarrant ˌofficer noun [countable] PMa middle rank in the army, air force, or US Navy
Examples from the Corpus
warrant officer• A warrant officer is appointed, not commissioned, and specializes in a particular skill.• The chef warrant officer was every bit as odious as Ingrid had been told to expect.• The incident follows the death less than two weeks ago of a marine warrant officer taking part in the same exercise.• The warrant officer was speechless, but not for long and he thundered at him as he had on me a few minutes before. 