/ Dictionary / Index N non est: Meaning and Definition of Find definitions for: non est Pronunciation: (non' est'), [key] — Law. Law. the returning of a sheriff 's writ when the person to be arrested or served with it cannot be found in the sheriff 's jurisdiction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nonest (Thesaurus) nonessential nonesuch Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language