Concave
adjective
Curved inwards.
The spoon has a concave shape.

Often appears as...
- concave shape
- concave surface
noun
A shape or surface that is curved inwards.
A spoon is a common example of a concave.

Often appears as...
- a concave
- the concave
adjective
Curved inwards.
The spoon has a concave shape.

Often appears as...
- concave shape
- concave surface
noun
A shape or surface that is curved inwards.
A spoon is a common example of a concave.

Often appears as...
- a concave
- the concave
Definition 1 of 2

Physical Objects
Use 'concave' for physical objects like dishes or reflectors that curve inward.

The satellite dish has a concave surface to focus signals.
Not Flat
'Concave' suggests that something is not flat, but rather it curves inside like a cave.

Skateboarders prefer ramps that are concave for better tricks.
Optics Context
In optics, 'concave' refers to lenses or mirrors that spread out light rays.

Her glasses use concave lenses because she is nearsighted.
Physical Objects
Use 'concave' for physical objects like dishes or reflectors that curve inward.

The satellite dish has a concave surface to focus signals.
Not Flat
'Concave' suggests that something is not flat, but rather it curves inside like a cave.

Skateboarders prefer ramps that are concave for better tricks.
Optics Context
In optics, 'concave' refers to lenses or mirrors that spread out light rays.

Her glasses use concave lenses because she is nearsighted.
Physical Objects
Use 'concave' for physical objects like dishes or reflectors that curve inward.

The satellite dish has a concave surface to focus signals.
Not Flat
'Concave' suggests that something is not flat, but rather it curves inside like a cave.

Skateboarders prefer ramps that are concave for better tricks.
Optics Context
In optics, 'concave' refers to lenses or mirrors that spread out light rays.

Her glasses use concave lenses because she is nearsighted.
Video examples
The magic ingredient...
when you are trying to convince an audience that a robot has a personality and he's capable of falling in love. So we went to work on these optically perfect binoculars, trying to find a solution that would maintain his true robot materials but solve this reflection problem. So we started with the lenses. Here's the flat-front lens, we have a concave lens
Video examples
The 5 Musketeers Have an...
there they're concave bellies they're gonna be up and on the move again looking for some more potential prey but first it's time to just lie on a termite mound because that's what you do when you're a cheater as I said I don't think it'll be too
Video examples
How optical illusions...
even on a flat piece of paper, our brain reflexively creates the 3D concave or convex shape. Now for that creepy Lincoln upside down face. Faces trigger activity in areas of the brain that have specifically evolved to help us recognize faces.
Video examples
The magic ingredient...
when you are trying to convince an audience that a robot has a personality and he's capable of falling in love. So we went to work on these optically perfect binoculars, trying to find a solution that would maintain his true robot materials but solve this reflection problem. So we started with the lenses. Here's the flat-front lens, we have a concave lens
Video examples
The 5 Musketeers Have an...
there they're concave bellies they're gonna be up and on the move again looking for some more potential prey but first it's time to just lie on a termite mound because that's what you do when you're a cheater as I said I don't think it'll be too
Video examples
How optical illusions...
even on a flat piece of paper, our brain reflexively creates the 3D concave or convex shape. Now for that creepy Lincoln upside down face. Faces trigger activity in areas of the brain that have specifically evolved to help us recognize faces.
Example 1 of 3
Quote examples
Twiggy
English Model
They go on about banning size zero, but I think Hollywood stars are the worst perpetrators. Most models are naturally long and gangly, while a lot of these young girls in Hollywood have gone on extreme diets. Their concave chests and bony arms are terrifying. It's scary to think that normal teenagers are tempted to copy them.

Quote examples
Isabella Bird
English Explorer
The Japanese look most diminutive in European dress. Each garment is a misfit and exaggerates the miserable physique and the national defects of concave chests and bow legs. The lack of 'complexion' and of hair upon the face makes it nearly impossible to judge of the ages of men.

Quote examples
Frits Zernike
Dutch Physicist
About 1930, our laboratory had obtained a large concave grating and set it up in a Runge-Paschen mounting.

Quote examples
Gene Tunney
American Athlete
A concave chest means that your diaphragm is sagging.

Quote examples
Twiggy
English Model
They go on about banning size zero, but I think Hollywood stars are the worst perpetrators. Most models are naturally long and gangly, while a lot of these young girls in Hollywood have gone on extreme diets. Their concave chests and bony arms are terrifying. It's scary to think that normal teenagers are tempted to copy them.

Quote examples
Isabella Bird
English Explorer
The Japanese look most diminutive in European dress. Each garment is a misfit and exaggerates the miserable physique and the national defects of concave chests and bow legs. The lack of 'complexion' and of hair upon the face makes it nearly impossible to judge of the ages of men.

Quote examples
Frits Zernike
Dutch Physicist
About 1930, our laboratory had obtained a large concave grating and set it up in a Runge-Paschen mounting.

Quote examples
Gene Tunney
American Athlete
A concave chest means that your diaphragm is sagging.

Example 1 of 4
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