Definition of "letterboxing" [letterboxing]

• Present participle of letterbox. (verb)
• An outdoor hobby in which participants attempt to locate small boxes hidden in public places. (noun)

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• "I love the way Amanda has snuck in the Ticon letterboxing style, but totally made it her own."
• "I setup the export option to maintain the 16: 9 by letterboxing the original video in to a 4: 3 video."
• "They find interests in many different things, such as helping the elderly, letterboxing when they have free time, rearranging the furniture at home, and decorating seasonally for their mother, entertaining, sewing and cooking, all which take enormous amounts of time."