Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • interj. Used before the name of or a pronoun referring to a person or thing being formally addressed: "How can I put it to you, O you who prepare to travel with important matters on your mind?” ( Jo Durden-Smith).
  • interj. Used to express surprise or strong emotion: "O how I laugh when I think of my vague indefinite riches” ( Henry David Thoreau).
  • The symbol for the element oxygen.
  • abbr. Baseball out
  • abbr. outstanding

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The fifteenth letter of the basic modern Latin alphabet.
  • n. Symbol for oxygen.
  • n. The upper bound function also known as big O.
  • n. The fifteenth letter of the English alphabet, called o and written in the Latin script.
  • abbr. The number of overs bowled
  • n. A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor.
  • n. American Library Association Abbreviation of octavo, a book size (20-25 cm).
  • n. Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.
  • n. The ordinal number fifteenth, derived from this letter of the English alphabet, called o and written in the Latin script.
  • prep. The English vocative particle (always in upper case), used for direct address in translations from languages which have the vocative case.
  • interj. Expression of earnestness or reverence, used before the name of a deity or revered person in impassioned speech.

Etymologies

Old Saxon gloss o (950s) in Lambeth ms. (957) of Gallican Psalter and ó, o (>1000) in Durham Hymns, regularly as redundant "o eala þu" and "ó eala þu" at uppercase proper names in paraphrase and some verbs in periphrase; Anglo-Norman O (~1200) in mss. of Sts. Juliana and Katherine, and other religiose writs; and English O, o (~1525) in The New Testament Translation by William Tyndale for Ancient Greek , Latin o (vocative, intensive: Old English èalà, æàlà, ǽlà, hèlà; also Middle English O (Actus 13:10; Romayns 9:20; Galaþies 3:1), ò (Romayns 2:1,3), Irish a (Maþeu 15:28;17:17; Luk 9:41;24:25; Actus 13:10) or A (Actus 27:21; Romayns 11:33)—sometimes mistranscribed as O in online bibles—, þou (1Tymoþe 6:20), ȝe (Actus 18:14), or (Actus 1:1; Ebrews 10:7) in Newe Testament by Iohn Wiclif (1382). intensive, interrogative: Old English ; English lo, oh (1534)) (Wiktionary)

Examples

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    January 2, 2010