1
: hollowed or rounded inward like the inside of a bowl
a concave lens
2
: arched in : curving in
—used of the side of a curve or surface on which neighboring normals to the curve or surface converge and on which lies the chord joining two neighboring points of the curve or surface
Synonyms
Examples of concave in a Sentence
Adjective
a concave lens
Recent Examples on the Web
Matt Beer, Outside Online, 2 Nov. 2022
The record is so timeless and concave, or whatever the metaphors are.
—Amanda Petrusich, The New Yorker, 16 Oct. 2024
Andrew Liszewski, The Verge, 15 Oct. 2024
At least as long ago as the time of Confucius, and possibly earlier, Chinese households used concave mirrors to focus sunlight onto kindling to light cooking fires.
—Avery Hurt, Discover Magazine, 2 Oct. 2024
See all Example Sentences for concave 
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Adjective
Underneath are two concave rubber pads to grip the frame without the worry of scratching it up and are cinched down with mini TPU straps.
—Matt Beer, Outside Online, 2 Nov. 2022
The record is so timeless and concave, or whatever the metaphors are.
—Amanda Petrusich, The New Yorker, 16 Oct. 2024
Noun
Unlike other split keyboards that appeal to those who like to customize everything right down to the feel of the keys, the Flow uses proprietary rubber dome switches and custom backlit concave keycaps that aren’t designed to be swapped out with third-party alternatives.
—Andrew Liszewski, The Verge, 15 Oct. 2024
At least as long ago as the time of Confucius, and possibly earlier, Chinese households used concave mirrors to focus sunlight onto kindling to light cooking fires.
—Avery Hurt, Discover Magazine, 2 Oct. 2024
See all Example Sentences for concave
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Cite this Entry
“Concave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/concave. Accessed 1 Dec. 2024.
Copy CitationMedical Definition
concave
adjective
con·cave
kän-ˈkāv, ˈkän-ˌ 
: hollowed or rounded inward like the inside of a bowl
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