revelation
US /ˌrev.əˈleɪ.ʃən/
UK /ˌrev.əˈleɪ.ʃən/

1.
a surprising and previously unknown fact, especially one that is made known in a dramatic way
:
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The discovery of the ancient manuscript was a major revelation.
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His confession was a shocking revelation to everyone.
2.
the divine or supernatural disclosure to humans of something relating to human existence or the world
:
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Many religions are founded on divine revelation.
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The prophet received a direct revelation from God.