oh exclamation, noun definition, meaning - what is oh exclamation, noun in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “oh”

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oh

exclamation uk   /əʊ/  us   //
A1 used to express different emotions, such as surprise, disappointment, and pleasure, often as a reaction to something someone has said: "He's been married three times." "Oh, really? I didn't know that!" "I'm afraid I can't come to the party." " Oh, that's a shame." Is that for me? Oh, you're so kind! "I'm sorry I forgot to call you." "Oh, don't worry."A1 introduces an idea that you have just thought of, or something that you have just remembered: Oh, I've just thought of a problem. Oh, and don't forget to lock the back door.A1 used with other expressions of disappointment, sadness, anger, etc.: Oh dear, what a mess! Oh no, I've left my umbrella behind!
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oh

noun [C] (also o) uk   /əʊ/  us   //
sometimes used in writing for the number zero: My phone number is five, double oh, seven, six, six.
(Definition of oh exclamation, noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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