Definition of blue screen in English:

blue screen

Syllabification: blue screen

noun

[often as modifier]
(In film and video techniques such as chromakey) a blue (or green) background in front of which moving subjects are filmed and which allows a separately filmed background to be added to the final image: a blue-screen effect Also called green screen.
More example sentences
  • There's also some truly heinous use of blue screen.
  • There you see her in front of the green screen.
  • An actor stands in front of a green or blue screen.

Definition of blue screen in:

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