We would like to show you a description here but the site won’t allow us. Definition of o noun in oxford advanced learner's dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Learn how to easily type o with accent marks for various languages. Enhance your typing skills today! The fifteenth letter of the english alphabet, a vowel. See examples of o used in a sentence. O is used to mean zero, for example when you are telling someone a phone number, or mentioning a year such as 1908. O' is used in written english to represent the word `of' pronounced without the ` f. ' O, the fourth vowel of the modern alphabet, corresponding to the semitic ayin, which represented a breathing and not a vowel.

O is used to mean zero, for example when you are telling someone a phone number, or mentioning a year such as 1908. O' is used in written english to represent the word `of' pronounced without the ` f. ' O, the fourth vowel of the modern alphabet, corresponding to the semitic ayin, which represented a breathing and not a vowel. The semitic form may have derived from an earlier sign representing an eye.