WordDictionary

Noun:

• computing an error screen displayed by some operating systems, most notably Microsoft Windows, after encountering a critical system error which can cause the system to shut down, to prevent damage to system hardware. Also known as a "Blue Screen of Death" or "BSoD."
• film 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 difference image or scene.
• film The visual effect resulting from this technique as well as the colored screen itself, especially blue.

Verb:

• intransitive|computing To experience a stop error and shut down to prevent damage to system hardware.