con·​vex | \kän-ˈveks; ˈkän-ˌveks, kən-ˈveks \

Definition of convex 

1a : 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

2a 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

Its legs had been shortened, the shell was gouged and dirty, convex Perspex windows had been removed, and the interior had been flooded by rainwater and slathered in plaster. Eve M. Kahn, New York Times, "No, Your Furniture Shouldn’t Drip or Burst," 2 Mar. 2018 Also, the blade has a slightly convex shape to reduce friction, meaning the knife won’t get stuck mid-performance. Elaheh Nozari, Bon Appetit, "This Is the Serrated Knife to End All Serrated Knives," 26 Feb. 2018 Clerics who were reading scholarly manuscripts started using convex pieces of clear glass to magnify the text. Joe Bargmann, Popular Mechanics, "What the Hummingbird Can Tell Us About Innovation," 15 Oct. 2014 Here, the classic Vans waffle sole design is echoed in the Ultra Range by essentially inverting it, creating a sole with convex rubber ridges that give you additional grip on rugged terrain. Jake Woolf, GQ, "These New Vans Sneakers Are The Summer Kicks You Can Where Anywhere," 23 July 2017 Strapped inside the truck was a breakfront with four doors, each set with three convex panes of glass. Celia Barbour, ELLE Decor, "Two Long-Lost Friends Tackle A Cluttered NYC Apartment, And The Results Are Magic," 15 May 2015 Plait hypothesizes that these aren't convex tubes at all but concave gulleys lined with ridges of sand. Erik Davis, WIRED, "Mars Gone Wild," 1 Aug. 2004

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'convex.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of convex

1571, in the meaning defined at sense 1a

History and Etymology for convex

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

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The first known use of convex was in 1571

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English Language Learners Definition of convex

: having a shape like the outside of a bowl : curving outward


con·​vex | \kän-ˈveks, ˈkän-ˌveks\

Kids Definition of convex

: rounded like the outside of a ball or circle


con·​vex | \kän-ˈveks; ˈkän-ˌ, kən-ˈ \

Medical Definition of convex 

: curved or rounded like the exterior of a sphere or circle convex lenses are used to correct for farsightedness

Other Words from convex

convexity \kən-​ˈvek-​sət-​ē, kän-​ \ noun plural -ties

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More from Merriam-Webster on convex

Rhyming Dictionary: Words that rhyme with convex

Spanish Central: Translation of convex

Nglish: Translation of convex for Spanish Speakers

Britannica English: Translation of convex for Arabic Speakers

Comments on convex

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a nest or breeding place

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