Associations to the word «Duality»

Wiktionary

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

Dictionary definition

DUALITY, noun. Being twofold; a classification into two opposed parts or subclasses; "the dichotomy between eastern and western culture".
DUALITY, noun. (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.
DUALITY, noun. (geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry.

Wise words

Life has no meaning unless one lives it with a will, at least to the limit of one's will. Virtue, good, evil are nothing but words, unless one takes them apart in order to build something with them; they do not win their true meaning until one knows how to apply them.
Paul Gauguin