(rev′ə·lā′shən) noun
1. The act or process of revealing, or the state of being revealed.
2. That which is or has been revealed.
3. Theol. a The act of revealing or communicating divine truth, especially by divine agency or supernatural means. b That which has been so revealed, as concerning God in his relations to man. c That which is revealed inthe Bible itself. [<OF <LL revelatio, -onis <L revelatus, pp. of revelare. See REVEAL.]

(rev′ə·lā′shən)
The Apocalypse, or Book of Revelation: in full, The Revelation of Saint John the Divine; the last book of the Bible.