Definition of oracle noun from the Oxford Advanced American Dictionary

     

    oracle

     noun
    noun
    NAmE//ˈɔrəkl//
     
    , NAmE//ˈɑrəkl//
     
    [countable]
     
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  1. 1(in ancient Greece) a place where people could go to ask the gods for advice or information about the future; the priest or priestess through whom the gods were thought to give their message They consulted the oracle at Delphi.
  2. 2 (in ancient Greece) the advice or information that the gods gave, which often had a hidden meaning
  3. 3[usually singular] a person or book that gives valuable advice or information My sister's the oracle on investment matters.