a. an overcasting stitch, esp. one made with a strip of leather or a thick leatherlike cord.
b. a spaced running stitch in contrasting or heavy thread, used mainly for decoration, usually along an edge.
2. Bookbinding.a binding stitch made by inserting a staple through the center of folded sheets from the back and clinching in the fold.
Pronunciation: (sad'l-stich"), [key]
to sew, bind, or decorate with a saddle stitch.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.