Openwork fabrics: Lace and net are open work fabrics. French seams or overedge seams are the best for openwork fabrics and double stitched seams also work well.

Overedge stitch: A stitch which wraps over the edge of the fabric to prevent it from raveling. The same as an overlock stitch.

Overlock: An overlock stitch is very useful for fabric which ravels easily. Some regular sewing machines have an overlock feature. Sergers perform the overlock stitch and trim the seam allowance a the same time.

Overcasting: Overcasting refers to any form of stitch which wraps over the edge of the fabric and helps prevent it from raveling. Many sewing machines have a variety of overcast stitches. Overcast stitches can also be done by hand.