well-round·ed • adj. having a smooth, curved shape: well-rounded quartz pebbles. ∎ (of a person) plump. ∎ pleasingly varied or balanced: a dry, robust, well-rounded wine. ∎ (of a person) having a personality that is fully developed in all aspects. ∎ (of a phrase or sentence) carefully composed and balanced. ∎ (of an education) covering well the necessary areas of instruction.