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Meaning of parallel postulate

par'allel pos'tulate

Pronunciation: [key]
— Geom. Geom.
  1. the axiom in Euclidean geometry that only one line can be drawn through a given point so that the line is parallel to a given line that does not contain the point. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.