Late Renaissance or early Baroque design of an O, from 1627. Its graphic form has remained fairly constant from Phoenician times until today. The name of the Phoenician letter was

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.

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

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 Jamestown in …

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

Dec 11, 2025 · Learn the various methods and techniques to type the letter O with an accent mark (ò, ó, ô, õ, ö) using your Windows or Mac keyboard.

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

Learn how to easily type O with accent marks for various languages. Enhance your typing skills today!

O, o meaning: 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.