/ Dictionary / Index A A.A.S.: Meaning and Definition of Find definitions for: A.A.S. Pronunciation: [key] Fellow of the American Academy. American Academy of Sciences. Associate in Applied Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aas (Thesaurus) AARP A.A.U. Related Content Daily Word Quiz: circumspect Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language