imbecility imbecilitate • imbed · · · Info · Definitions · Synonyms · Characters · · imbecility · · Text Latin · · Script 10 · · Length Definitions · · · (noun) retardation more severe than a moron but not as severe as an idiot. · · Noun Definition 1 (noun) a stupid mistake. Synonyms: stupidity, betise, folly, foolishness. · · Noun Definition 2 Synonyms · · · stupidity · · Synonym 1 betise · · Synonym 2 folly · · Synonym 3 foolishness · · Synonym 4 Characters · · b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D t latin small letter t U+0074 y latin small letter y U+0079