convex

adjective

con·​vex kän-ˈveks  ˈkän-ˌveks 

kən-ˈveks

1

a

: curved or rounded outward like the exterior of a sphere or circle

b

: being a continuous function or part of a continuous function with the property that a line joining any two points on its graph lies on or above the graph

2

a

of a set of points : containing all points in a line joining any two constituent points

b

of a geometric figure : comprising a convex set when combined with its interior

a convex polygon

Examples of convex in a Sentence

Recent Examples on the Web

Next, tape a piece of plastic food wrap over the convex side. — Staff Author, Martha Stewart, 31 Mar. 2026

These patients are more likely to require convex barriers. — Diego Schaps, STAT, 1 Apr. 2026

The Grade 5 titanium case features a pebble-like form with a domed sapphire crystal over a convex dial. — Anthony Demarco, Forbes.com, 12 Apr. 2026

The shutter release is rounded and concave, versus the oval convex button from the original Camp Snap. — Jim Fisher, PC Magazine, 2 June 2026

Word History

Etymology

Middle French or Latin; Middle French convexe, from Latin convexus vaulted, concave, convex, from com- + -vexus; perhaps akin to Latin vehere to carry — more at way

First Known Use

1571, in the meaning defined at sense 1a

Phrases Containing convex

• concavo-convex
• plano-convex

Rhymes for convex

• annex
• annexe
• apex
• aztecs
• carex
• codecs
• codex
• cusecs
• duplex
• execs
• fedex
• kleenex

Kids Definition

convex

adjective

con·​vex kän-ˈveks  kən- 

ˈkän-ˌveks

: curved or rounded like the outside of a sphere or circle

a convex lens

convexity

kən-ˈvek-sət-ē, 

kän-

noun

Medical Definition

convex

adjective

con·​vex kän-ˈveks; ˈkän-ˌ  kən-ˈ 

: curved or rounded like the exterior of a sphere or circle

convex lenses are used to correct for farsightedness

convexity

kən-ˈvek-sət-ē, kän- 

noun

plural convexities