mental soundness mental retardation • mental state · · · Info · Definitions · Synonyms · Characters · · mental soundness · · Text Common · · Latin · · Scripts 16 · · Length 4 · · Syllables Definitions · · · (noun) the healthy psychological state of someone with good judgment. Synonyms: mental soundness, mental balance. · · Noun Definition 1 Synonyms · · · mental balance · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075