renterv. t.1. To enter again.()2. (Engraving) To cut deeper, as engraved lines on a plate of metal, when the engraving has not been deep enough, or the plate has become worn in printing.()v. i. To enter anew or again.()Rentering angle, an angle of a polygon pointing inward, as a, in the cut. -- Rentering polygon, a polygon having one or more rentering angles.()