/ Dictionary / Index A Atl.: Meaning and Definition of Find definitions for: Atl. Pronunciation: [key] Atlantic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Atkinson Atlanta Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language