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 …

Learn how to type O with accent mark on Windows and Mac. Acute, grave, circumflex, tilde, and umlaut accents like Ò, Ó, Ô, Õ, Ö or ò, ó, ô, õ, ö.

O definition: 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.

The name of the Latin scriptletter O/o. A zero(used in reading out numbers). It is currently two-o-five in the afternoon (2:05 PM). The first permanent English settlement in America was in …

Used before the name of or a pronoun referring to a person or thing being formally addressed: "How can I put it to you, O you who prepare to travel with important matters on your mind?"