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English definition of “p.m.”

p.m.

adverb [not gradable] (also P.M.)  /ˈpiˈem/ us  
used when referring to a time between twelve o’clock in the middle of the day and twelve o’clock at night; in the afternoon or evening or at night: Our plane is due to arrive at 8:30 p.m.
(Definition of p.m. from the Cambridge Academic Content Dictionary © Cambridge University Press)
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