EnglishMain Dictionary
O
Universal Words
noun, exclamation
noun (also o) (plural O's, o's )
1 [C,U] the 15th letter of the English alphabet:
'Orange' begins with (an) O / 'O'.
2 (spoken) used to mean 'zero' when saying telephone numbers, etc:
My number is six o double three (= 6033).
seealsoOGRADE, OLEVEL
exclamation (rare, especially literary) = OH
