/ Dictionary / Index D del: Meaning and Definition of Find definitions for: del Pronunciation: (del), [key] (in names of Spanish derivation) a contraction of de and the article el: Estanislao del Campo. (in names of Italian derivation) a contraction of di and the article il: Giovanni del Monte. del Pronunciation: (del), [key] — n. Math. a differential operator. Symbol: ▿ Cf. gradient (def. 4), Del. Pronunciation: [key] Delaware. del. Pronunciation: [key] delegate; delegation. delete; deletion. delineavit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. de Kruif delabialization Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language