In·step n. [Formerly also instop, instup.]
1. The arched middle portion of the human foot next in front of the ankle joint.
3. That part of the hind leg of the horse and allied animals, between the hock, or ham, and the pastern joint.
◄ ►
In·stop v. t. To stop; to close; to make fast; as, to instop the seams. [Obs.]
◄ ►