- The highest point; the apex or summit: the vertex of a mountain.
- Anatomy.
- The highest point of the skull.
- The top of the head.
- Astronomy. The highest point reached in the apparent motion of a celestial body.
- Mathematics.
- The point at which the sides of an angle intersect.
- The point on a triangle or pyramid opposite to and farthest away from its base.
- A point on a polyhedron common to three or more sides.
[Latin, whirlpool, crown of the head (where the hair forms a whorl), vertex, from vertere, to turn.]






