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TOEFL BNC: 21027 COCA: 20157

concave

1 ENTRIES FOUND:
concave /ˌkɑːnˈkeɪv/ adjective
concave
/ˌkɑːnˈkeɪv/
adjective
Learner's definition of CONCAVE
[more concave; most concave]
: having a shape like the inside of a bowl : curving inward凹的
opposite convex
TOEFL BNC: 21027 COCA: 20157

concave

1 of 2

adjective

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

concave

2 of 2

noun

con·​cave ˈkän-ˌkāv How to pronounce concave (audio)
: a concave line or surface

Example Sentences

Recent Examples on the Web
Adjective
This board is made with 7-ply maple and 2-ply bamboo for flexible riding, and its longboard shape is slightly concave, giving it extra stability and shock absorption. Kevin Cortez, Popular Mechanics, 11 July 2022 Sonos also built the end caps on the speaker to be concave, resulting in a more durable overall structure while reducing the chance that users will accidentally push one of the buttons during transport. Popular Science, 9 Mar. 2021 At the top is a concave portion of the tower riddled with holes and punctuated by a bright green — that’s the Xbox branding coming through. Brittany Vincent, CNN Underscored, 5 Nov. 2020 Gently form the mixture into patties 1/2- to 3/4-inch thick, making the patties completely flat or even slightly concave. cleveland, 3 June 2020 Most important, the K380’s rounded, mildly concave keys are fast and comfortable, with ample but not too much space between them. Jeff Dunn, Ars Technica, 19 Nov. 2018 The interiors of both look great, with soft touch materials on nearly every surface, ambient lighting and attractive concave trim panels with unusual trim that looked like three-dimensional pieces of metal. Mark Phelan, Detroit Free Press, 23 May 2018 The Canaday brothers revolutionized snowboarding by combining the two traditional board shapes—convex (better for hard, fast turns) and concave (better on powder)—into one that's good at everything. Michael Stilwell, Popular Mechanics, 29 June 2017 Its concave east and west sides would be adorned with vertical fins. Blair Kamin, chicagotribune.com, 18 Apr. 2018
Noun
Built in the form of an oval and clad in floor-to-ceiling concave windows that give the façade a petal-like outline, the structure frames striking views of Denver’s downtown. Los Angeles Times, 28 July 2022 Hike amid old-growth trees on your way to an 80-foot-high concave bluff. Megan Michelson, Outside Online, 31 Dec. 2020 His father, a former All-Navy athlete who’d been the city’s first black firefighter, had finally come home from the hospital in a wheelchair with a missing finger, muscle tremors and a concave dent on the top of his head. Eli Saslow, Washington Post, 7 Aug. 2022 Testers found that the extra volume under the chest made the board extremely easy to paddle, yet the shallow single to double concave V bottom allowed for a great mix of speed and control. Zander Morton, Outside Online, 27 May 2022 It was conjectured that the polynomials for these more general objects should also have coefficients that are log concave. Quanta Magazine, 5 July 2022 Further, no other 604 has mirror-straight flanks like this one—the factory manufacturing process always warped the rear doors into a slight concave. Brendan Mcaleer, Car and Driver, 3 July 2022 Their large feet and long toes form concave surfaces that may function as a kind of parachute, slowing their fall through the air. New York Times, 26 May 2022 This one is a prime example of Muller’s early, more traditional work, and features Breguet-style hands and numerals as well as a polished case with a concave bezel. Paige Reddinger, Robb Report, 23 June 2022 See More

Word History

Etymology

Adjective and Noun

Middle English, from Latin concavus, from com- + cavus hollow — more at cave

First Known Use

Adjective

15th century, in the meaning defined at sense 1

Noun

1552, in the meaning defined above

Time Traveler
The first known use of concave was in the 15th century
TOEFL BNC: 21027 COCA: 20157

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