Duality

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

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

From WordNet (r) 2.0 [wn]:



  duality
       n 1: being twofold; a classification into two opposed parts or
            subclasses; "the dichotomy between eastern and western
            culture" [syn: {dichotomy}]
       2: (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 [syn: {wave-particle duality}]
       3: (geometry) the interchangeability of the roles of points and
          planes in the theorems of projective geometry