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



BrE BrE//djuːˈæləti//
; NAmE NAmE//duːˈæləti//
[uncountable, countable](pl. dualities)(formal)
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the state of having two parts or aspects Word Origin late Middle English: from late Latin dualitas, from dualis, from duo ‘two’.
See the Oxford Advanced American Dictionary entry: duality