/ Dictionary / Index N nullify: Meaning and Definition of Find definitions for: nul•li•fy Pronunciation: (nul'u-fī"), [key] — -fied, -fy•ing. to render or declare legally void or inoperative: to nullify a contract. to deprive (something) of value or effectiveness; make futile or of no consequence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nullify (Thesaurus) nullifidian nulling Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language