Definition of vertex in English:

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Pronunciation: /ˈvərˌteks/

noun (plural vertices /-təˌsēz/ or vertexes)

1The highest point; the top or apex.
Example sentences
  • But what vertices of anxiety lie behind the gentle opposition of town and country, youth and age when Janice arrives in Dulwich.
  • Balancing on the vertex requires enormous training in concentration.
  • The game begins at one particular vertex, corresponding to the starting position of the game.
1.1 Anatomy The crown of the head.
Example sentences
  • This will protect the perineum and assist in extension of the head as the vertex passes the symphysis.
  • As the head clears the pubic symphysis, the vertex is pulled upward at an angle of 45 degrees to the floor.
  • She has been left with extensive scars and areas of alopecia on the vertex, occipital, and right parietal regions of her head.
2 Geometry Each angular point of a polygon, polyhedron, or other figure.
Example sentences
  • Einstein observes that the Menelaus theorem is symmetric with respect to the vertices of the triangle.
  • Now add parallels beyond those in the same direction, through the vertices of the largest triangle.
  • He also found another solution where the three bodies were at the vertices of an equilateral triangle.
2.1A meeting point of two lines that form an angle.
Example sentences
  • Bond angles are calculated using the central atom as the vertex of the bond angle.
  • An undirected edge connecting these two vertices indicates this relationship.
  • Two adjacent vertices must be of the same colour.
2.2The point at which an axis meets a curve or surface.
Example sentences
  • Each vertex unit can have one vector and one scalar operation in flight simultaneously.
  • A graph is a mathematical structure consisting of vertices connected by edges.
  • A coin may only be placed by dragging the cursor along an edge from one vertex to another.


Late Middle English: from Latin, 'whirlpool, crown of a head, vertex', from vertere 'to turn'.

For editors and proofreaders

Syllabification: ver·tex

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