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chief petty officer
- An enlisted rank in the US Navy that is above petty officer first class and below senior chief petty officer.
- One who holds this rank.
(plural chief petty officers)
- (Canada, Navy) An warrant officer belonging to one of the two classes of chief petty officer: chief petty officer first class and chief petty officer second class.
- (UK, Navy) A non-commissioned officer in the Royal Navy, ranking above petty officer and below warrant officer class 2.
- (US, Navy) A non-commissioned officer in the United States Navy and United States Coast Guard, ranking above petty officer first class and below senior chief petty officer.