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Webster 1913 Edition


Duality

Du′al′i-ty

,
Noun.
[L.
dualitas
: cf. F.
dualité
.]
The quality or condition of being two or twofold; dual character or usage.

Webster 1828 Edition


Duality

DUALITY

,
Noun.
1.
That which expresses two in number.
2.
Division; separation.
3.
The state or quality of being two.

Definition 2024


duality

duality

English

Noun

duality (plural dualities)

  1. A classification into two subclasses or opposed parts.
  2. (projective geometry) The interchangeability of points and planes.
  3. (mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

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