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

duty officer

noun
 
/ˈdjuːti ɒfɪsə(r)/
 
/ˈduːti ɑːfɪsər/
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  1. the officer, for example in the police, army, etc., who is on duty at a particular time in a particular place
See duty officer in the Oxford Advanced American Dictionary
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