letter box

Noun

letterbox (plural letterboxes)

1. (Commonwealth, Ireland, UK) A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.

   Synonyms:

   mailbox, post box, pillar box

2. (Commonwealth, Ireland, UK) A 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

3. A hidden container that holds a logbook and rubber stamp, found by following clues as a form of recreation.
4. A 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

See all 7 meanings of letterbox