To dress stone roughly with the point, by which its faces are brought to approximately plane surfaces. 2. To fill and finish the surface of a masonry joint with mortar after the masonry has been laid, either to finish the joint or to repair a defective joint. 3. The major idea, essential part, or salient feature of a narrative or concept. 3. A dimensionless geometric element that has no property but location, as the intersection of two lines.