• Something shaped like the letter O.
  • 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.
  • Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.
  • The number of overs bowled.
  • Orgasm.
  • Opium.

Proper Noun

  • Alternative of E


Similar words


  • From Middle English O, o, from Old English o, from Latin o and Ancient Greek ὦ. Featured prominently in William Tyndale's 1525 translation of the New Testament.
  • Abbreviation.
  • Korean ^오(伍) or ^오(吳). Wu.
  • From Mandarin 鄂 Wade-Giles romanization: O⁴.

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