"To close the incision" means to sew or join together the cut or opening made during a surgical procedure. It is done to ensure the wound heals properly and prevent further damage or infection. Full definition
Researchers then closed the incision with stitches, reporting full cross-circulation between donor and recipient and that neither donor nor recipient had their circulation interrupted in the process. (seeker.com)
The stitches used to close the incision in your uterus will dissolve. (babycenter.com)
While in the end, a friend in the year above me was the actual one to perform the surgery and I was only involved in suturing closed the incision site, I learned a lesson from the old quote: «Never let the sun set on a pyo.» (vetstudentstories.merckmanuals.com)