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.

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.

The O with accent is a commonly used character in many languages, including Spanish, Portuguese, French, German, and Italian. Accents placed on the letter O —such as Ó, Ò, Ô, Õ, and Ö —change …

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

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