Dictionary  lead'ing edge'Pronunciation: (lē'ding), [key] 1. Aeron.the edge of an airfoil or propeller blade facing the direction of motion. 2. something that is or represents the most advanced or innovative aspect of a field, activity, profession, etc.; forefront; vanguard: the leading edge of technology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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