[ adjective kon-veks, kuh n-; noun kon-veks ]
/ adjective kɒnˈvɛks, kən-; noun ˈkɒn vɛks /


having a surface that is curved or rounded outward.Compare concave(def 1).
  1. (of a polygon) having all interior angles less than or equal to 180°.
  2. (of a set) having the property that for each pair of points in the set the line joining the points is wholly contained in the set.


a convex surface, part, or thing.

Origin of convex

1565–75; < Latin convexus equivalent to con- con- + -vexus, perhaps < *wek-sos, derivative of base of vehere to convey, if original sense was “brought together (to a single point)”


con·vex·ly, con·vex·ed·ly [kuh n-vek-sid-lee] /kənˈvɛk sɪd li/, adverbcon·vex·ed·ness, nounsub·con·vex, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for convex

British Dictionary definitions for convex

/ (ˈkɒnvɛks, kɒnˈvɛks) /


curving or bulging outwards
physics having one or two surfaces curved or ground in the shape of a section of the exterior of a sphere, paraboloid, ellipsoid, etca convex lens
maths (of a polygon) containing no interior angle greater than 180°


(tr) to make convex
Compare concave

Derived forms of convex

convexly, adverb

Word Origin for convex

C16: from Latin convexus vaulted, rounded
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for convex

[ kŏnvĕks′, kən-vĕks ]


Having a surface or boundary that curves or bulges outward, as the exterior of a sphere.

Other words from convex

con•vexi•ty n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for convex

[ kŏnvĕks′ ]

Curving outward, like the outer boundary of a circle or sphere.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.