Backstitch is a stitching technique which involves making small in and out stitches in order to securely fasten two fabric pieces together. This method adds resilience and avoids the material from fraying. The sew together may be used for a variety of sewing projects, like hemming, sewing patches, or even making quilts. It provides a tidy and expert look to the finished item.
Whipstitch definition of whipstitch by The Free Dictionary