chain stitch chains·titch uncommon noun 1. a kind of crochet stitch Synonymschain stitch 2. looped machine stitch resembling the links of a chain; used in embroidery and in machine stitching Synonymschain stitch Related words Broader terms machine stitchcrochet stitch WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.