Definition of concave adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Mar 2, 2021 · A concave is any line or surface that curves inward. (This line is a concave.) A convex is any line or surface that curves outward. (This surface is a convex.) It is not as common to use …

Sep 9, 2023 · Concave lenses focus light inside the curve of the lens, while convex lenses focus light using the outer curve. A lens that curves like a “C” (no flat side) is both concave or convex, …

May 15, 2026 · The meaning of CONCAVE is hollowed or rounded inward like the inside of a bowl. How to use concave in a sentence.

In mathematics, a concave function is one for which the function value at any convex combination of elements in the domain is greater than or equal to that convex combination of those domain elements.

Mar 9, 2026 · In geometry, concave describes a shape that has at least one interior angle greater than 180 degrees, creating an indentation or “caved-in” section. The word itself comes from the Latin …

Concave upward is when the slope increases ... Concave downward is when the slope decreases

Jul 13, 2021 · Concave and convex are literal opposites—one involves shapes that curve inward and the other involves shapes that curve outward. The terms can be used generally, but they’re often used in …

The concave, shiny building is built to maximize the use of sunlight, even on overcast days.

A concave shape is one that curves inward, like the inside of a bowl or a cave. Think about it this way: if you were standing inside a concave shape, the walls would curve toward you.