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Meaning of fuzzy set

fuzz'y set'

Pronunciation: [key]
— Math. Math.
  1. a generalization of a classical set with the property that each member of a population of objects has associated with it a number, usually from 0 to 1, that indicates the degree to which the object belongs to the set.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.