overstitch Syllabification: (o·ver·stitch)Pronunciation: /ˈōvərˌstiCH/Definition of overstitch noun a stitch made over an edge or over another stitch. verb Pronunciation: /ˌōvərˈstiCH/ [with object] sew with an overstitch. overstitch in other Oxford dictionaries Definition of overstitch in the British & World English dictionary