Definition of oracle
1a
: a person (such as a priestess of ancient Greece) through whom a deity is believed to speak
the prophecies of the Delphic oracle— D. F. Marks
b
: a shrine in which a deity reveals hidden knowledge or the divine purpose through such a person
c
: an answer or decision given by an oracle
ambiguous oracles
2a
: a person giving wise or authoritative decisions or opinions
She became an oracle of pop culture.
b
: an authoritative or wise expression or answer
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Merriam-Webster unabridged
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Time Traveler for oracle
The first known use of oracle was in the 15th century
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