Pronunciation: (pō"stur-u-zā'shun), [key]
1. a process for producing a posterlike, high-contrast color reproduction from continuous-tone art by using separation negatives of various densities.
2. Photog.a printing process in which all tone values of a negative are reduced to a few and the tonal separation negatives produced are printed at different exposure levels on a high-contrast film so that a set of flat tones results.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.