| Gibbous 1. (a.) Swelling by a regular curve or surface; protuberant; convex; as, the moon is gibbous between the half-moon and the full moon. 2. (a.) Hunched; hump-backed. Thesaurus Entries arched, arciform, arclike, arcual, bandy, bowed, bowlike, bunchbacked, camelback, concave, convex, convexed, crookbacked, embowed, excurvate, excurvated, excurved, gibbose, humpbacked, humped, humpy, hunchbacked, hunched, hunchy, kyphotic, out-bowed, oxbow, rotund, vaulted |