oracle

Short definition from Wiktionary

Noun

1. 1
   A shrine dedicated to some prophetic deity.
2. 2
   A person such as a priest through whom the deity is supposed to respond with prophecy or advice.
3. 3
   A prophetic response, often enigmatic or allegorical, so given.
4. 4
   Something said that must come true or cannot be countermanded; an inexorable command or declaration.
5. 5
   A person considered to be a source of wisdom.
6. 6
   A wise sentence or decision of great authority.
7. 7
   A fortune-teller.
8. 8
   One who communicates a divine command; an angel; a prophet.
9. 9
   The sanctuary, or most holy place in the temple; also, the temple itself.
10. 10
    A theoretical entity capable of answering some collection of questions.
11. 11
    A third-party service that provides smart contracts with information from the outside world.

Verb

1. 1
   To utter oracles or prophecies.

Proper noun

1. 1
   A database management system (and its associated software) developed by the Oracle Corporation