Definitions for: Duality

[n] (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry
[n] (physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory
[n] being twofold; a classification into two opposed parts or subclasses; "the dichotomy between eastern and western culture"

Webster (1913) Definition: Du"al"i*ty, n. [L. dualitas: cf. F. dualit['e].]
The quality or condition of being two or twofold; dual
character or usage.

Synonyms: dichotomy, wave-particle duality

See Also: categorisation, categorization, classification, exchangeability, fungibility, interchangeability, interchangeableness, property

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