noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   A hobby in which participants attempt to locate small boxes containing rubber stamps by following clues. uncountable
2. 2
   The practice of transferring film shot in a widescreen aspect ratio to standard-width video formats while preserving the film's original aspect ratio. uncountable

Verb

1. 1
   present participle and gerund of letterbox form-of, gerund, participle, present

Synonyms

All synonyms

letterbox format

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.