[ adjective, verb kon-keyv, kon-keyv; noun kon-keyv ]
/ adjective, verb kɒnˈkeɪv, ˈkɒn keɪv; noun ˈkɒn keɪv /
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curved like a segment of the interior of a circle or hollow sphere; hollow and curved.Compare convex (def. 1).
Geometry. (of a polygon) having at least one interior angle greater than 180°.
a concave surface, part, line, or thing.
Machinery. a concave piece, as one against which a drum rotates.
verb (used with object), con·caved, con·cav·ing.
to make concave.
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Origin of concave
OTHER WORDS FROM concave
con·cave·ly, adverbcon·cave·ness, nounsub·con·cave, adjectivesub·con·cave·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use concave in a sentence
The head is small relative to the body length and, when viewed laterally, is slightly concaved or scooped on the upper margin.
The flukes are broad, concaved on the rear margin, and deeply notched.
In the eyes now glaring at them malevolently through heavily concaved spectacles they read hate unutterable.
As a rule, in wild turkeys we find the craniofrontal region more concaved and wider across than it is in the tame varieties.The Wild Turkey and Its Hunting|Edward A. McIlhenny
The first shaded figure, therefore, represents a concaved surface, and the second figure a convex surface.Carpentry for Boys|J. S. Zerbe
British Dictionary definitions for concave
/ (ˈkɒnkeɪv, kɒnˈkeɪv) /
physics having one or two surfaces curved or ground in the shape of a section of the interior of a sphere, paraboloid, etca concave lens
maths (of a polygon) containing an interior angle greater than 180°
an obsolete word for hollow
(tr) to make concave
Derived forms of concaveconcavely, adverbconcaveness, noun
Word Origin for concave
C15: from Latin concavus arched, from cavus hollow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for concave
[ kŏn′kāv′ ]
Curved inward, like the inside of a circle or sphere.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.