English Explanatory Dictionary

concave

English dictionary entry

Meanings

adj
  1. Curved like the inner surface of a sphere or bowl.
  2. Not convex; having at least one internal angle greater than 180 degrees.
  3. Satisfying the property that all segments connecting two points on the function's graph lie below the function.
  4. Hollow; empty.
noun
  1. A concave surface or curve.
  2. The vault of the sky.
  3. One of the celestial spheres of the Ptolemaic or geocentric model of the world.
  4. An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
  5. An indentation running along the base of a surfboard, intended to increase lift.
  6. An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
  7. A playing card made concave for use in cheating.
verb
  1. To render concave, or increase the degree of concavity.

Pronunciation

/ˈkɒn.keɪv/ /kɒnˈkeɪv/ /ˈkɑn.keɪv/ /kɑnˈkeɪv/ /kənˈkeɪv/ en-us-concave.ogg

Word forms

concave more concave most concave concaves concaving concaved

Etymology

From Middle English concave, from Old French concave, from Latin concavus.

Synonyms

concavous

Antonyms

convex

Derived words

biconcave concavation concave envelope concave function concavely concaveness concavification concavify concavity concavoconcave convexoconcave double concave nonconcave planoconcave proconcave pseudoconcave quasiconcave subconcave upper concave envelope concaver
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