a. | 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 |
2. | Hollow; void of contents. | |
n. | 1. | A hollow; an arched vault; a cavity; a recess. |
2. | (Mech.) A curved sheath or breasting for a revolving cylinder or roll. | |
v. t. | 1. | To make hollow or concave. |
Adj. | 1. | concave - curving inward |