/ Dictionary / Index A acid trip: Meaning and Definition of Find definitions for: ac'id trip" Pronunciation: [key] — Slang. Slang. a psychedelic experience induced by ingesting the hallucinogen LSD. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acid-tongued acidulant Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language