Definition of saddle stitch
noun
a stitch of thread or a wire staple passed through the fold of a magazine or booklet. [mass noun] (in needlework) a decorative stitch made with long stitches on the upper side of the cloth alternated with short stitches on the underside.
verb
(saddle-stitch) [with object] sew with a saddle stitch: a short-sleeved white shirt, saddle-stitched round the collar