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.

Accents placed on the letter O —such as Ó, Ò, Ô, Õ, and Ö —change pronunciation, meaning, or grammatical emphasis. Accented O has a unique sound, and its usage varies depending on the …

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 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.

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.

Listed below are the keyboard shortcuts or Windows Alt codes for letter O with accents. The accents on the letter O are also called accent marks, diacritics, or diacritical marks.

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

Jan 13, 2026 · The letters O and o take this name if they are not treated as alphabetic letters used to represent phonemes /ɔ/. For example, in geometry, "point O" is called "điểm ô", not "*điểm o".

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