coffer coffeewood • cofferdam · · · Info · Definitions · Synonyms · Characters · · coffer · · Text Latin · · Script 6 · · Length Definitions · · · (noun) an ornamental sunken panel in a ceiling or dome. Synonyms: caisson, lacuna. · · Noun Definition 1 (noun) a chest especially for storing valuables. · · Noun Definition 2 Synonyms · · · caisson · · Synonym 1 lacuna · · Synonym 2 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 o latin small letter o U+006F r latin small letter r U+0072