/ Dictionary / Index A AMS: Meaning and Definition of Find definitions for: AMS Pronunciation: [key] Agricultural Marketing Service. A.M.S. Pronunciation: [key] Army Medical Staff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ams (Thesaurus) Amritsar Amsterdam Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language