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English definition of “O, o”

O, o

exclamation     /əʊ/ US  // old use or literary
used when talking to someone or something, or expressing something in an emotional or formal way: O Zeus! Hear my prayer. → Compare oh exclamationInterjectionsSounds used as interjections
(Definition of O, o exclamation from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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