Definitions for "Stitch in the ditch"
Keywords:  ditch, topstitch, quilt, sew, seam
A sewing method where stitches are sewn in the "ditch" created by the joins of the pattern pieces. General sewing term.
Topstitch right between two sewn pieces in the ditch made by the seam. If you carefully stay in the ditch and the thread is a good color match, you won't even see the stitching from the front. This is also called a crack-stitch, or stitch in the groove.
Quilting done right next to the seams, so it almost disappears. This is more of a functional approach to attaching the layers together than a decorative one.