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).
Digital Technology, Television. to display (a film or video) by using the letterbox technique.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use letterbox in a sentence
There could be but one other person who would possess a key to the house and the letter-box—and he lives in St. Petersburg.In the Fog | Richard Harding Davis
So she put a stamp on the envelope, and went downstairs herself, and dropped it into the letter-box.The Angel of Pain | E. F. Benson
It was handed in with the others from the front door letter-box this morning in an unstamped envelope.
And once I had remembered that the very letter-box was set like teeth against the outer world.Witching Hill | E. W. Hornung
I will take the liberty of dropping it in the letter-box at your hall-door as I go out.
British Dictionary definitions for letter box
a slot, usually covered with a hinged flap, through which letters, etc, are delivered to a building
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