an even stronger stitch than a back tack; bar tacks are stitches sewn over stitches at a perpendicular. The result is a rectangular stitch pattern and a very secure intersection of fabrics.
Hand or machine stitch to reinforce areas of stress-( zipper, pocket opening, end of buttonhole).
A group of closely sewn stitchs (back and forth from side to side a la zig zag) that is used to tack a belt loop or similar item in place. This is not a basting stitch and should be repeated several times on the machine to make a very short run of satin stitching. General sewing term.