letter box
Quick Summary
The term "letter box" has two primary meanings. In British English, it refers to a mailbox, which can be either a personal box at a dwelling for receiving mail or a public box for depositing outgoing mail. This is synonymous with the American term "mailbox".12
A secondary meaning of "letter box" relates to a hobby similar to geocaching. In this context, a letterbox is a container hidden in an outdoor location, typically containing a logbook and a rubber stamp for enthusiasts to find and use. This activity is known as letterboxing.13
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