An imaginary wall behind the camera which indicates the separation between the setting of the film or TV show and the audience. It may be "broken" for humorous effect.

The fourth wall is an imaginary wall behind the camera which indicates the separation between the setting of the film or TV show and the audience. The concept originated in live theater in which the fourth wall was the missing wall at the front of the stage through which the audience views the actors. It may be "broken" for humorous effect.

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