'Concave' definitions:

Definition of 'concave'

From: WordNet
adjective
Curving inward [ant: bulging, convex]

Definition of 'Concave'

From: GCIDE
  • Concave \Con"cave\, v. t. [imp. & p. p. concaved; p. pr. & vb. n. Concaving.] To make hollow or concave. [1913 Webster]

Definition of 'Concave'

From: GCIDE
  • Concave \Con"cave\ (k[o^][ng]*k[=a]*v" or k[o^]n"-; 277), a. [L. concavus; con- + cavus hollow: cf. F. concave. See Cave a hollow.]
  • 1. 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; as, a concave mirror; the concave arch of the sky. [1913 Webster]
  • 2. Hollow; void of contents. [R.] [1913 Webster]
  • As concave . . . as a worm-eaten nut. --Shak. [1913 Webster]

Definition of 'Concave'

From: GCIDE
  • Concave \Con"cave\, n. [L. concavum.]
  • 1. A hollow; an arched vault; a cavity; a recess. [1913 Webster]
  • Up to the fiery concave towering hight. --Milton. [1913 Webster]
  • 2. (Mech.) A curved sheath or breasting for a revolving cylinder or roll. [1913 Webster]

Synonyms of 'concave'

From: Moby Thesaurus