Learn how to say Duality correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word duality:
noun (plural dualities)
1 [mass noun] the quality or condition of being dual:
this duality of purpose was discernible in the appointments
Mathematics the property of two theorems, expressions, etc., of being dual to each other.
Physics the quantum-mechanical property of being regardable as both a wave and a particle.
2an instance of opposition or contrast between two concepts or two aspects of something; a dualism:
his photographs capitalize on the dualities of light and dark, stillness and movement
late Middle English: from late Latin dualitas, from dualis (see dual)