Definition of idiosyncrasy noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɪdiəˈsɪŋkrəsi//
; NAmE NAmE//ˌɪdiəˈsɪŋkrəsi//
[countable, uncountable] (pl. idiosyncrasies)
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a person’s particular way of behaving, thinking, etc., especially when it is unusual; an unusual feature synonym eccentricity Wearing a raincoat, even on a hot day, is one of her idiosyncrasies. The car has its little idiosyncrasies. Word Originearly 17th cent. (originally in the sense ‘physical constitution peculiar to an individual’): from Greek idiosunkrasia, from idios ‘own, private’ + sun ‘with’ + krasis ‘mixture’.Extra examples The microphone is likely to exaggerate the idiosyncrasies of a voice. The pub was famous for the idiosyncrasies of its landlord. We are all individuals, unique beings with our own special qualities and idiosyncrasies.
See the Oxford Advanced American Dictionary entry: idiosyncrasy