having an outline or surface that curves inward like the interior of a circle or sphere, curved like the inner surface of a sphere

concave lens, concave polygon, concave function

Formal and Informal Expressions of concave

In different contexts, you can replace 'concave' with suitable alternatives. In a more formal setting, 'incurvate' is apt. In informal speech or writing, 'hollow, sunken' is a commonplace synonym.

concave: Explore its Definition & Usage

concave Definition

1having an outline or surface that curves inward like the interior of a circle or sphere
2curved like the inner surface of a sphere

Using concave: Examples

Take a moment to familiarize yourself with how "concave" can be used in various situations through the following examples!

Example
The spoon has a concave shape.
Example
The mirror was concave and distorted the image.
Example
The cave had a concave ceiling.

concave Synonyms and Antonyms

Synonyms for concave

Antonyms for concave

convex
bulging

Phrases with concave

concave lens
a lens that is thinner at the center than at the edges, used to correct nearsightedness
Example
He needs to wear glasses with concave lenses.
concave polygon
a polygon with at least one interior angle greater than 180 degrees
Example
A concave polygon can have one or more 'dents' in its shape.
concave function
a function whose graph is always curved downward
Example
The function y = x^2 is a concave function.

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Summary: concave in Brief

The term 'concave' [känˌkāv, känˈkāv] refers to a shape or surface that curves inward like the interior of a circle or sphere. It can be used to describe objects like spoons or mirrors, as well as natural formations like caves. 'Concave' also has specific applications in fields like optics and mathematics, such as 'concave lens' or 'concave function.'