1. a small area or spot; the sharp end of an object. 2. to approach the surface, like the pus of an abscess, at a definite spot or place. 3. a tapered, pointed endodontic instrument used for exploring the depth of the root canal in root canal therapy; called also root canal point. point A a radiographic, cephalometric landmark, determined on the lateral head film; it is the most retruded part of the curved bony outline from the anterior nasal spine to the crest of the maxillary alveolar process. absorbent point in root canal therapy, a cone of variable width and taper, usually made of paper or a paper product, used to dry or maintain a liquid disinfectant in the canal. Called also paper point.