suture /so̅o̅″chər/ [L, sutura] , 1. n., a border or a joint, such as between the bones of the cranium. 2. v., to stitch together cut or torn edges of tissue with suture material. 3. n., a surgical stitch taken to repair an incision, tear, or wound. 4. n., material used for surgical stitches, such as absorbable or nonabsorbable silk, catgut, wire, or synthetic material.