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English definition of “idiosyncrasy”

idiosyncrasy

noun [C]    /ˌɪd·i·əˈsɪŋ·krə·si/
a strange or unusual habit, way of behaving, or feature: One of her many idiosyncrasies is always smelling a book before opening it.
(Definition of idiosyncrasy noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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