/ Dictionary / Index N nullity: Meaning and Definition of Find definitions for: nul•li•ty Pronunciation: (nul'i-tē), [key] — pl. -ties the state or quality of being null; nothingness; invalidity. something null. something of no legal force or validity. a person of negligible importance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nullity (Thesaurus) nullipore nullius filius* Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language