lacuna lactyl • lacunae · · · Info · Definitions · Synonyms · Characters · · lacuna · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a blank gap or missing part. Synonyms: blank. · · Noun Definition 1 (noun) an ornamental sunken panel in a ceiling or dome. Synonyms: coffer, caisson. · · Noun Definition 2 Synonyms · · · blank · · Synonym 1 coffer · · Synonym 2 caisson · · Synonym 3 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 l latin small letter l U+006C n latin small letter n U+006E u latin small letter u U+0075