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letterbox

[ let-er-boks ]
/ ˈlɛt ərˌbɒks /
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noun
Also letter box .Chiefly British. a public or private mailbox.
Digital Technology, Television. a technique for displaying a wide-screen film or landscape video on a narrower screen by reducing its size but retaining the aspect ratio, with black bands filling the screen above and below the picture (often used attributively):letterbox videos.Compare pan and scan, pillarbox (def. 1).
verb (used with object)
Digital Technology, Television. to display (a film or video) by using the letterbox technique.
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Origin of letterbox

First recorded in 1765–75; letter1 + box1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use letterbox in a sentence

British Dictionary definitions for letterbox

letter box

noun mainly British
  1. a slot, usually covered with a hinged flap, through which letters, etc, are delivered to a building
  2. a private box into which letters, etc, are delivered
Also called: postbox a public box into which letters, etc, are put for collection and delivery
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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