idiosyncrasy idiostatic • idiosyncratic · · · Info · Definitions · Synonyms · Characters · · idiosyncrasy · · Text Latin · · Script 12 · · Length Definitions · · · (noun) a behavioral attribute that is distinctive and peculiar to an individual. Synonyms: foible, mannerism. · · Noun Definition 1 Synonyms · · · foible · · Synonym 1 mannerism · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 y latin small letter y U+0079