adjective. Curved like the inner surface of a sphere.

noun. A concave surface, structure, or line.

transitive verb. To make concave.

To make hollow.

noun. The vault or arch of heaven: as, “the blue concave.”

noun. A playing card so trimmed that it can be separated from others according to the purpose for which the pack was prepared.

Curved or rounded in the manner of the circumference of a circle or the surface of a sphere when viewed from the center; presenting a hollow or incurvation; incurved; hence, bounded by such a line or surface: as, a concave mirror.

Hollow; empty.

noun. A hollow; an arch or vault; a concavity.

noun. Any inwardly curved portion of a machine: as, the concave of a thresher (the curved breast in which the cylinder works).

noun. A concave mirror.

noun. A hollow; an arched vault; a cavity; a recess.

noun. A curved sheath or breasting for a revolving cylinder or roll.

adjective. Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex.

adjective. Hollow; void of contents.

transitive verb. To make hollow or concave.

adjective. curved like the inner surface of a sphere or bowl

noun. A concave surface or curve.

noun. The vault of the sky.

noun. One of the celestial spheres of the Ptolemaic or geocentric model of the world.

noun. An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.

noun. An indentation running along the base of a surfboard, intended to increase lift.

noun. An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.

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

adjective. curving inward

convex  

concave brick  concave leaf  concave lens  concave mirror  

acetabular  biconcave  boat-shaped  bowl-shaped  bursiform  

concaved  concavely  concaveness  concaver  concaving  

Dave  Wave  aftershave  behave  brave  

concentric  conical  convex  corrugated  domed  

arched  arciform  arclike  arcual  bandy  

concaved  concaves  concaving