insubstantiality insubstantial • insubstantiate · · · Info · Definitions · Antonyms · Characters · · insubstantiality · · Text Latin · · Script 16 · · Length Definitions · · · (noun) lack of solid substance and strength. · · Noun Definition 1 (noun) lacking substance or reality. · · Noun Definition 2 Antonyms · · · substantiality · · Antonym 0 substantialness · · Antonym 1 solidness · · Antonym 2 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079