Thesaurus: concave

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Definitions

1. a. 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.
2. a. Hollow; void of contents.
3. n. A hollow; an arched vault; a cavity; a recess.
4. n. A curved sheath or breasting for a revolving cylinder or roll.
5. v. t. To make hollow or concave.
6. adj. curving inward
7. 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. 2. Hollow; void of contents. [R.] As concave . . . as a worm-eaten nut. Shak. 1. A hollow; an arched vault; a cavity; a recess. Up to the fiery concave towering hight. Milton. 2. (Mech.) A curved sheath or breasting for a revolving cylinder or roll. To make hollow or concave.
8. A curved sheath or breasting for a revolving cylinder or roll.