vertex
nounDefinition of vertex
1
: the top of the head
2a
: the point opposite to and farthest from the base in a figure
b
: 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 curves
c
: 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
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