What does "letterbox" mean?
A box into which mail is put.; A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.
adj, noun, verb ·Uncommon ·Advanced level
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"A wad of junk mail was pushed through the letterbox in the front door and dropped onto the mat."
"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."
"I found your letter in the letterbox."
A box into which mail is put.; A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.
Common synonyms include: apply letterboxing, fit mail slot, format video, install mail slot, letterbox format, mail.
I found your letter in the letterbox.
From letter + box.