Definition of vertex
- the vertex of the hill
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.
First Known Use: 14th centurySee Words from the same year
: a point where two lines meet to form an angle; especially : the point on a triangle that is opposite to the base
What made you want to look up vertex? Please tell us where you read or heard it (including the quote, if possible).
Merriam-Webster's New Words Quiz—Fall 2017 Edition!
Test your knowledge - and maybe learn something along the way.TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.TAKE THE QUIZ