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

The celestial interiors are inspired by the zodiac, including a convex mirror that’s meant as a nod to both the cosmos and mythical traditions. —Nicole Kliest, Vogue, 4 Sep. 2025

In 1969, after it had been converted to apartments and the same year astronauts first landed on the moon, the old house rebuilt as a single-family home by architect Maurice Medcalfe, who conceived the smooth stucco facade punctuated by the Space Age grid of convex oval windows. —Tori Latham, Robb Report, 28 Aug. 2025

The 1 to 4 inch cap is smooth and dry, flat to convex, and usually white with a skirt-like ring at the top of the stem. —Mary Marlowe Leverette, Southern Living, 13 Aug. 2025

The convex portion is made from silicone, which is a low-cost material with sufficient optical qualities. —IEEE Spectrum, 6 Aug. 2025

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