backwardness backwardly • backwards · · · Info · Definitions · Synonyms · Characters · · backwardness · · Text Latin · · Script 12 · · Length Definitions · · · (noun) lack of normal development of intellectual capacities. Synonyms: retardation, mental retardation, slowness, subnormality. · · Noun Definition 1 Synonyms · · · retardation · · Synonym 1 mental retardation · · Synonym 2 slowness · · Synonym 3 subnormality · · Synonym 4 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 k latin small letter k U+006B n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 w latin small letter w U+0077