1. A projecting, usually richly carved ornament placed at the of ribs, groins, beams, etc., or at the termination of a molding.
2. In masonry, a roughly shaped stone set to project for carving in place.
3. To hammer sheet metal to conform to an irregular surface.
4.A protuberance on a pipe, fitting, or part designed to add strength, to facilitate alignment during assembly, to provide for fastenings, etc.
