o

[[t]o͟ʊ[/t]]

O's, o's

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. [SPOKEN]

3) EXCLAM (feelings) O is used in exclamations, especially when you are expressing strong feelings. [LITERARY]

→ See also oh

O how mistaken you are!...

O God, I want to go home.

4) O is used as an abbreviation for words beginning with o, such as `old' or `organization'.