/ Dictionary / Index A acidic: Meaning and Definition of Find definitions for: a•cid•ic Pronunciation: (u-sid'ik), [key] — adj. acid (def. 6). acid (def. 9). acid-forming (def. 1). containing acid-bearing pollutants: Acidic runoff is poisoning the nation's rivers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: acidic (Thesaurus) acid house acidify Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language