letterbox

plural letterboxes · alternative letter box

1. A box into which mail is put.
   1. CommonwealthIrelandUKA collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.

      Synonyms: mailbox, post box, pillar box

   2. CommonwealthIrelandUKA delivery point for mail, a box, compartment or slot for this purpose.

      A wad of junk mail was pushed through the letterbox in the front door and dropped onto the mat.

      Synonyms: mailbox, mail slot

2. A hidden container that holds a logbook and rubber stamp, found by following clues as a form of recreation.
3. hobbiesA rectangular hole or slot.

   His strength was running out fast: one more good letterbox was all that he could conceive himself able to make. He made it, hacking away with slow, painful strokes, his axe-handle slippery with his sweat.

   1954, Daniel Talbot, A Treasury of Mountaineering Stories, page 239

alternative letter box

1. not comparablebroadcastingTransferred to home video formats while preserving the original aspect ratio, having black bars above and below the picture area.

present singular third person letterboxes · participle present letterboxing · participle past letterboxed · past letterboxed · alternative letter box

1. transitivebroadcastingTo 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.
2. intransitivetransitiveTo hunt for letterboxes (containers with logbook and rubber stamp) by following clues.