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English definition of “idiosyncrasy”

idiosyncrasy

noun [C usually plural] uk   /ˌɪd.i.əˈsɪŋ.krə.si/ us  
a strange or unusual habit, way of behaving, or feature that someone or something has: She often cracks her knuckles when she's speaking - it's one of her little idiosyncrasies. One of the idiosyncrasies of this printer is that you can't stop it once it has started.Habitual behaviour
idiosyncratic
adjective uk   /-sɪŋˈkræt.ɪk/ us    /-sɪŋˈkræt̬.ɪk/
The film, three hours long, is directed in his usual idiosyncratic style.Strange, suspicious and unnaturalHabitual behaviour
(Definition of idiosyncrasy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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