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  1. O - Wikipedia

    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.

  2. 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 …

  3. 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.

  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, 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.

  6. O noun - Definition, pictures, pronunciation and usage notes

    Nov 3, 2017 · Definition of O noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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

    Definitions of O noun the 15th letter of the Roman alphabet synonyms: o see more

  8. O - Simple English Wikipedia, the free encyclopedia

    In chemistry, O represents the symbol "oxygen". In medicine, O is one of the human blood types. Sometimes when saying decimals, O is another word for 0.

  9. "O" Tickets - Cirque du Soleil

    Buy tickets for "O", at Bellagio in Las Vegas, NV created by Cirque du Soleil. View seating chart & price.

  10. 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.