o meaning, o definition | English Cobuild dictionary

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O, o

  ( O's, o's    plural  )
1       n-var   O is the fifteenth letter of the English alphabet.  
2       num   O is used to mean zero, for example when you are telling someone a telephone number, or mentioning a year such as 1908.  
3       exclam   O is used in exclamations, especially when you are expressing strong feelings.  
LITERARY, feelings   O how mistaken you are!..., O God, I want to go home.     
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