Oracles work as a bridge between the real world and the blockchain by providing data to the smart contracts.

oracle (Wikipedia)
Consulting the Oracle by John William Waterhouse, showing eight priestesses in a temple of prophecy

In classical antiquity, an oracle was a person or agency considered to provide wise and insightful counsel or prophetic predictions or precognition of the future, inspired by the gods. As such it is a form of divination.

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