/ Dictionary / Index A ARS: Meaning and Definition of Find definitions for: ARS Pronunciation: [key] advanced record system. Agricultural Research Service. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ars (Thesaurus) Arru Islands Arsaces I Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language