Gĭb'bous, a.

a. [Lat. gibbosus. See GIBBOSE.] 1. Swelling by a regular curve or surface; protuberant; convex; as, the moon is gibbous between the quarters and the full moon, the enlightened part being then convex. The bones will rise, and make a gibbous member. Wiseman. 2. Hunched; hump-backed. [Obs.] Browne.