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1. (n.) The final edited version of a program, recorded on high-quality audio tape, videotape, or film, that is intended for broadcast or as the source for duplication. 2. (v.) To produce stamper molds used for replication. 3. (v.) In CD manufacturing, to create a glass master from which copies are reproduced. A laser beam “engraves” the pits, which represent binary data, into a photo-resistant surface.