Pronunciation: (in'step"), [key]
1. the arched upper surface of the human foot between the toes and the ankle.
2. the part of a shoe, stocking, etc., covering this surface.
3. the front of the hind leg of a horse, cow, etc., between the hock and the pastern joint; cannon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.