Definitions

1. noun

a type of sewing stitch used to finish seams or edges, typically with a lockstitch on the underside

“The seamstress used an overlock to prevent fraying on the hem of the pants.”

2. verb

to sew or finish with an overlock stitch, typically to prevent fraying or to give a decorative edge

“The tailor overlocked the edges of the jacket to give it a professional finish.”