O. O is the fifteenth (number 15) letter in the English alphabet and it has a shape of a circle. It appears after “N” and before “P”. This super-catchy and clear alphabet song also lets children hear the letter O sound and see each letter at the beginning of five simple words paired with colorful kid-friend images. Use this music video to teach and learn the Alphabet, Phonics, the Short Vowel O Sound, the Long Vowel O Sound, Vocabulary Words with the Short O Sound and Long O Sound, and How to Write. Ó (minuscule: ó), known as O-acute, is a Latin-script character composed of the letter O and an acute accent. It is found in the Czech, Dobrujan Tatar, Emilian-Romagnol, Faroese, Hungarian, Icelandic, Kashubian, Polish, Slovak, Karakalpak, and Sorbian languages. 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. 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, Ö —change pronunciation, meaning, or grammatical emphasis. Easy Learning Spanish Grammar. O definition: the fifteenth letter of the English alphabet, a vowel. See examples of O used in a sentence. O (minuscule: 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.