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Definition of petty officer noun from the Oxford Advanced Learner's Dictionary

petty officer

noun

/ˌpeti ˈɒfɪsə(r)/

/ˌpeti ˈɑːfɪsər/

(abbreviation PO)

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a sailor of middle rank in the navyTopics War and conflictc2

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See petty officer in the Oxford Advanced American Dictionary

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