convex

UK: /ˈkɒnvɛks/, /kɒnˈvɛks/

US: /kɑnˈvɛks/

US: (adj. kon veks′, kən-; n. kon′veks)

WordReference Random House Learner's Dictionary of American English © 2025

con•vex /kɑnˈvɛks/   adj. 

1. curved or rounded outward like the outside of a circle or sphere.Compare concave.

con•vex•ly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2025

con•vex  (adj. kon veks′, kən-;n. kon′veks), adj. 

1. having a surface that is curved or rounded outward. Cf. concave (def. 1).
2. Mathematics
   • (of a polygon) having all interior angles less than or equal to 180°.
   • Mathematics (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.

n. 

3. a convex surface, part, or thing.

• *wek-sos, derivative of base of vehere to convey, if original sense was "brought together (to a single point)''
• Latin convexus equivalent. to con- con- + -vexus, perh.
• 1565–75

con•vex′ly, con•vex•ed•ly  (kən vek′sid lē), adv.  con•vex′ed•ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

convex / ˈkɒnvɛks kɒnˈvɛks/ adjective

1. curving or bulging outwards
2. having one or two surfaces curved or ground in the shape of a section of the exterior of a sphere, paraboloid, ellipsoid, etc: a convex lens

Compare concaveEtymology: 16th Century: from Latin convexus vaulted, rounded

ˈconvexly adverb