Letterbox meaning

lĕtər-bŏks
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A collection point for mail intended for onward delivery, a secure box or recepticle for this purpose.
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A delivery point for mail, a box, compartment or slot for this purpose.
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A format for presenting movies on television that maintains the rectangular theater image on a television screen by reducing the overall image until the full width can be seen, resulting in blank space above and below the image.
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To produce or present (film) in a letterbox format.
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A video format designed to display the widescreen image of a film on a traditional-width video screen, by means of dark bands above and below the image.
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Telecast or recorded for playback using such a format.
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The visual effect of black bars on the top and bottom of the screen when a movie with a wide aspect ratio is displayed on a TV that is not as wide. The black bars compensate for the reduced vertical height of the movie frames. This was a common experience on earlier TV sets if the movie was not reformatted for TV viewing (see pan & scan). The term "letterbox" was coined because the wide frame resembles the size of a letter envelope. See pillarbox, aspect ratio and anamorphic DVD.
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(film) Transferred to home video formats while preserving the original aspect ratio, having black bars above and below the picture area.
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(film) To transfer a widescreen motion picture to home video formats while preserving the original aspect ratio, with the placing of black bars above and below the picture area.
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