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  1. O - Wikipedia

    In English, the name of the letter is the "long O" sound, pronounced / ˈoʊ /. In most other languages, its name matches the letter's pronunciation in open syllables. Its graphic form has …

  2. O' Definition & Meaning - Merriam-Webster

    The meaning of O' is on. How to use o' in a sentence.

  3. O | History, Etymology, & Pronunciation | Britannica

    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 …

  4. o - Wiktionary, the free dictionary

    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 …

  5. O definition and meaning | Collins English Dictionary

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

  6. O - Definition, Meaning & Synonyms | Vocabulary.com

    noun the blood group whose red cells carry neither the A nor B antigens synonyms: group O, type O see more

  7. O, o | definition in the Cambridge English Dictionary

    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.

  8. O - definition of O by The Free Dictionary

    O, o (oʊ) n., pl. O's Os, o's os oes. 1. the 15th letter of the English alphabet, a vowel. 2. any spoken sound represented by this letter.

  9. O Definition & Meaning | Dictionary.com

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

  10. O Definition & Meaning - YourDictionary

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