/ Dictionary / Index I interpolation: Meaning and Definition of Find definitions for: in•ter•po•la•tion Pronunciation: (in-tûr"pu-lā'shun), [key] — n. the act or process of interpolating or the state of being interpolated. something interpolated, as a passage introduced into a text. the process of determining the value of a function between two points at which it has prescribed values. a similar process using more than two points at which the function has prescribed values. the process of approximating a given function by using its values at a discrete set of points. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: interpolation (Thesaurus) interpolate interpose Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language