Meaning of odd permutation

odd' permuta'tion

Pronunciation: [key]
— Math. Math.
  1. a permutation of a set of n elements, x, x, … , x, which permutes the product of all differences of the form (x–x), where i is less than j, into the negative of the product. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.