Definition of "vertex"

The highest point, top or apex of something.

1. (anatomy) The highest surface on the skull; the crown of the head.  examples

(geometry) An angular point of a polygon, polyhedron or higher order polytope.

1. The common point of the two rays that form an angle.  examples

2. The point at which an axis meets a curve or surface.  examples

(mathematics) A point on the curve with a local minimum or maximum of curvature.  examples

(graph theory) One of the elements of a graph joined or not by edges to other vertices.  examples

(computer graphics) A point in 3D space, usually given in terms of its Cartesian coordinates.  examples

(optics) The point where the surface of a lens crosses the optical axis.  examples

(particle physics) An interaction point.  examples

(astrology) The point where the prime vertical meets the ecliptic in the western hemisphere of a natal chart.

(typography) A sharp downward point opposite a crotch, as in the letters "V" and "W" but not "Y".  examples