oh - definition in the Learner's Dictionary - Cambridge Dictionaries Online

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English definition of “oh”

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oh

exclamation
 
 
/əʊ/
PAUSE A1 used before you say something, often before replying to what someone has said: "Ian's going." "Oh, I didn't realize." "I'm so sorry." "Oh, don't worry."Sounds used as interjectionsInterjections
EMOTION A1 used to show an emotion or to emphasize your opinion about something: Oh, no! I don't believe it! "I don't think I can come." "Oh, that's a shame." Oh, how sweet of you!Sounds used as interjectionsInterjections
(Definition of oh from the Cambridge Learners Dictionary © Cambridge University Press)
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