immatureness immaturely • immaturity · · · Info · Definitions · Synonyms · Characters · · immatureness · · Text Latin · · Script 12 · · Length Definitions · · · (noun) not having reached maturity. Synonyms: immaturity. · · Noun Definition 1 Synonyms · · · immaturity · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075