Revelation

(n.) The act of revealing, disclosing, or discovering to others what was before unknown to them.

Revelation - Other Definitions

(n.) The act of revealing, disclosing, or discovering to others what was before unknown to them.
(n.) That which is revealed.
(n.) The act of revealing divine truth.
(n.) That which is revealed by God to man; esp., the Bible.
(n.) Specifically, the last book of the sacred canon, containing the prophecies of St. John; the Apocalypse.