Concave definitions

kŏn-kāv', kŏn'kāv'
Curved like the inner surface of a sphere.
adjective
31
1
A concave surface, structure, or line.
noun
27
0
Having a surface that is curved like the inside of a bowl.
adjective
27
0
To make concave.
verb
24
2
A concave surface, object, etc.
noun
24
2
To make concave.
verb
21
1
Curved like the inner surface of a sphere or bowl.
adjective
9
0
adjective
9
0
The definition of concave is curving inward.

When a lens curves inward, it is an example of a concave lens.

adjective
6
0
(set theory, not comparable, of a set) Not convex; arranged such that there exist at least two points for which a straight line between these points does not lie wholly within the set.
adjective
5
0
A concave surface or curve.
noun
5
0
Curved inward, like the inside of a circle or sphere.
4
0
(functional analysis, not comparable, of a real-valued function on the reals) Having an epigraph which is a concave set.
adjective
2
0
The vault of the sky.
noun
2
0
One of the celestial spheres of the Ptolemaic or geocentric model of the world.

Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661).

noun
0
0
(manufacturing) An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
noun
0
0
(surfing) An indentation running along the base of a surfboard, intended to increase lift.
noun
0
0
(skateboarding) An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
noun
0
0
To render concave, or increase the degree of concavity.
verb
0
0

Origin of concave

Middle English from Latin concavus com- intensive pref. com– cavus hollow keuə- in Indo-European roots