O, or o, is the fifteenth letter and the fourth vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide.

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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.

Learn about capital O. Hear and say its name and sound; see and trace its shape.About Waterford:Waterford.org is a national not-for-profit organization dedic...

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O is used to mean zero, for example when you are telling someone a phone number, or mentioning a year such as 1908.

O definition: the fifteenth letter of the English alphabet, a vowel. See examples of O used in a sentence.

O, o definition: 1. the 15th letter of the English alphabet 2. used in speech to mean zero: 3. used when talking to…. Learn more.

Definition of O noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

The fifteenth letter of the English alphabet, called o and written in the Latin script.