/ Dictionary / Index S soft drug: Meaning and Definition of Find definitions for: soft' drug' Pronunciation: [key] a drug, usually illicit, that does not produce significant psychological or physical dependence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. soft drink soften 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