/ Dictionary / Index P partial derivative: Meaning and Definition of Find definitions for: par'tial deriv'ative Pronunciation: [key] — Math. Math. the derivative of a function with respect to one of its variables with all other variables held constant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. partial denture partial differential Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language