RhymeZone: topstitch definitions

Definitions of topstitch:

noun: (sewing, uncountable) A sewing technique, most often used on garment edges such as necklines and hems, where it helps facings to stay in place and gives a crisp edge.
noun: (countable) An individual stitch of this kind.
verb: (transitive) To stitch in this fashion.

(Definitions from Wiktionary)