Plump nake. He was a plump [= chubby] little boy. To become well-rounded, chubby, or full in form. well filled out or rounded; fleshy or chubby: a plump turkey. (of amounts of money) generous; ample: a plump cheque. See examples of PLUMP used in a sentence. 3. . A falling, plunging, or colliding suddenly or heavily. having a pleasantly soft, rounded body or shape: 2. Check meanings, examples, usage tips, pronunciation, domains, and related words. dgcvgkf2q0gyaqg1u9vg5rcwebcacjtpmzygfohs26aidpbhh588