Collins COBUILD Advanced Learner's English Dictionary - o o

(O’s, o’s) 1. O is the fifteenth letter of the English alphabet. N-VAR 2. O is used to mean zero, for example when you are telling someone a telephone number, or mentioning a year such as 1908. (SPOKEN) NUM 3. O is used in exclamations, especially when you are expressing strong feelings. (LITERARY) O how mistaken you are!... O God, I want to go home. EXCLAM c darkgreen]feelings see also oh