matte 1 
(măt)
(măt)n.
1. Variant of mat2.
2.
a. An opaque border or pattern placed between a source of light and a photosensitive surface to prevent exposure of specified portions of the surface.
b. A map specifying how two electronic images of the same size and shape are to be cropped for combination into a single image.
3. A kind of paint that dries to a dull finish.
adj. also mat
Having a dull finish.