from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The filmmaking technique of shooting foreground action against an evenly-lit monochromatic background for the purpose of removing the background from the scene and replacing it with a different image or scene.
- n. The visual effect resulting from this technique as well as the colored screen itself, especially blue.
- n. Short for blue screen of death.
A compound of blue + screen, from the historical film-making technique of using blue backgrounds. (Wiktionary)