what is an edge math
Definition of Edge. Edges are the intersection of faces in a three-dimensional figure. In the cube shown, the red line segment is the intersection of the faces A and B of the cube.
(ÉdÊ) n., v. edged, edgâ¢ing. n. 1. a line or border at which a surface terminates: Grass grew along the edge of the road. 2. a brink or verge: the edge of a cliff; the edge of disaster. 3. any of the narrow surfaces of a thin, flat object: a book with gilt edges. 4. a line at which two surfaces of a solid object meet. 5. the thin, sharp side of the blade of a cutting instrument or weapon. 6. the sharpness proper to a blade: The knife has lost its edge. 7. a quality of sharpness or keenness: Her voice had an edge to it.