Oct 10, 2025 rotund rō-ˈtənd 2 syllables rare ‹ adjective. marked by roundness: rounded a master of rotund diction adjective. marked by fullness of sound or cadence: orotund, sonorous adjective. notably plump: chubby › Origin Latin rotundus, probably alteration of Old Latin *retundus; akin to Latin rota wheel.