how to pronounce concave


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An example use of concave in a speech by a native speaker of american english:

“… sweeping eyebrow or the concave curve of …”

meanings of concave


  1. An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
  2. An indentation running along the base of a surfboard, intended to increase lift.
  3. A concave surface or curve.
  4. One of the celestial spheres of the Ptolemaic or geocentric model of the world.
  5. An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
  6. The vault of the sky.


  1. Curved like the inner surface of a sphere or bowl.
  2. Satisfying the property that all segments connecting two points on the function's graph lie below the function.
  3. Hollow; empty.
  4. Not convex; having at least one internal angle greater than 180 degrees.


  1. To render concave, or increase the degree of concavity.