/ Dictionary / Index A A-1: Meaning and Definition of Find definitions for: A-1 Pronunciation: (ā'wun'), [key] — adj. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. A, a aa Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language