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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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  1. a sailor of middle rank in the navyTopics War and conflictc2
See petty officer in the Oxford Advanced American Dictionary
trait
noun
 
 
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