Breadcrumb Home > Dictionary > Index N nescience: Meaning and Definition of Find definitions for: nesc•ience Pronunciation: (nesh'uns, nesh'ē-uns, nes'ē-), [key] — n. lack of knowledge; ignorance. agnosticism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nescience (Thesaurus) n.e.s. nesosilicate ✖ Related Content Daily Word Quiz: guilloche Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language