1. Carpentry. The amount of exposure of a joint of one piece of trim overlapping another. 2. Staging. The intentional exposure for the first time of an object or person. A company's CEO may be "revealed" with the aid of a Kabuki drop, pyro and lasers. Likewise with the newest automobile model. 3. RevEAL (Revolutionary Entertainment & Architectural Lighting)™, a line of LED-source fixtures by Prism Projection.