duality

1. (countable, uncountable)The quality of containing or comprising two often opposed parts or aspects.

   the moral duality of certain characters

   Mother Nature's eternal duality, both life-giving and destructive

   being twofold; a classification into two opposed parts or subclasses

2. (countable, uncountable)The aggregate of two complementary subclasses or parts.

   philosophical duality

   The novel explored the duality of good and evil.

3. (countable, uncountable)The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

   wave-particle duality

4. (countable, uncountable)The interchangeability of points and planes.

   Dualität

   (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry

1. Wholeness is the opposite of duality.

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2. Only in love are unity and duality not in conflict.

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3. The duality of art is a fatal consequence of the duality of man.

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4. Modern understanding of the dynamics of quantum particles took a non-intuitive turn with the introduction of the particle-wave duality concept.

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5. Light behaves both as a wave and as a particle. This is known as wave-particle duality.

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