/ Dictionary / Index S sour salt: Meaning and Definition of Find definitions for: sour' salt' Pronunciation: [key] crystals of citric acid used as a flavoring in foods, carbonated beverages, and pharmaceuticals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sourpuss soursop Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language