Definition of vertex
verticesplay \ˈvər-tə-ˌsēz\ also
1 : the top of the head
2a : the point opposite to and farthest from the base in a figureb : a point (as of an angle, polygon, polyhedron, graph, or network) that terminates a line or curve or comprises the intersection of two or more lines or curvesc : a point where an axis of an ellipse, parabola, or hyperbola intersects the curve itself
3 : a principal or highest point : summit the vertex of the hill
Recent Examples of vertex from the Web
Since the cone has its vertex at the origin, the radius of each horizontal slice will be the x value of that function.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vertex'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of vertex
Middle English, top of the head, from Latin vertic-, vertex, vortic-, vortex whirl, whirlpool, top of the head, summit, from vertere to turn
First Known Use: 14th century
VERTEX Defined for English Language Learners
Definition of vertex for English Language Learners
: a point where two lines meet to form an angle; especially : the point on a triangle that is opposite to the base
VERTEX Defined for Kids
Definition of vertex for Students
1 : the point opposite to and farthest from the base of a geometrical figure
2 : the common endpoint of the sides of an angle
Seen and Heard
What made you want to look up vertex? Please tell us where you read or heard it (including the quote, if possible).