Reveal definition

From , from earlier , from + , from .

The outer side of a window or door frame; the jamb.
- Carter B. Horsley, The Upper East Side Book:
  
  The building has a one-story rusticated limestone base and a canopied entrance with a doorman beneath an attractive, rusticated limestone window reveal on the second floor and a very impressive and ornate limestone window reveal on the third floor flanked by female figures.
A revelation; an uncovering of what was hidden.

The reveal in that movie was great.

2001, Nicholas Proferes, Film Directing Fundamentals http://books.google.com/books?hl=en&id=8UkrTrb1y88C&pg=PA37&lpg=PA37&sig=9LrVWui5Pc-pHYD23unYfCyHcDg

The reveal is a narrative/dramatic element so pervasive that its power can be underestimated by the beginning filmmaker because, in a sense, each shot reveals something.
2002, Blain Brown, Cinematography http://books.google.com/books?hl=en&id=1JL2jFbNPNAC&pg=PA66&lpg=PA66&sig=mMrBLvPxRrwexc9sNLY0pHRoRDo

A simple dolly or crane move can be used for an effective reveal. A subject fills the frame, then with a move, something else is revealed.
2004, Fred Karlin, On the Track http://books.google.com/books?hl=en&id=4Dj42oNleXIC&pg=PA178&lpg=PA178&sig=DCz0jkLLrqsMKmwSlZXFahyBnog

Look for the reveal of the ghosts hanging in the school hallway (00:57:27); [...]

To uncover; to show and display that which was hidden.
To communicate that which could not be known or discovered without divine or supernatural instruction.