1. letterboxing - Noun
2. letterboxing - Verb
letterboxing
present participle of letterbox
letterboxing (uncountable)
English Wikipedia has an article on:letterboxingWikipedia
A hobby in which participants attempt to locate small boxes containing rubber stamps by following clues.
The growing popularity of the somewhat similar activity of geocaching during the 2000s has increased interest in letterboxing as well. Source: Internet
Geocache clues make use of GPS coordinates, whereas letterboxing clues tend to consist of grid references and compass bearings. Source: Internet
Initially, letterboxing was limited to several key sequences of a film such as opening and closing credits, but was later used for entire films. Source: Internet
Interest in letterboxing in the U.S. is generally considered to have started with a feature article in the Smithsonian Magazine citation in April 1998. Source: Internet
Much of the terminology below is associated with letterboxing in the US and would be unfamiliar to UK letterboxers. Source: Internet