From Longman Dictionary of Contemporary Englishpsychedelicpsy‧che‧del‧ic /ˌsaɪkəˈdelɪk◂/ adjective [usually before noun] 1 MDDpsychedelic drugs such as LSD make you hallucinate (=see things that do not exist)2 Chaving or using bright colours or strange sounds, and representing the experiences people have when they use drugs such as LSD a psychedelic light show Fashion designers look back to the 1960s with dazzling psychedelic prints. —psychedelically /-kli/ adverb —psychedelia /-ˈdiːliə/ noun [uncountable] sixties psychedelia
Examples from the Corpus
psychedelic• Four cuts of trancey exchange from Future Rhythm, with the pay-off being hugely psychedelic.• The Psychedelics Encyclopedia lists nine families of different psychedelic drugs.• In doing so, he relies heavily on the work of ethno-botanist and psychedelic frontiersman Terence McKenna.• Gareth wore of course his psychedelic jacket.• He wore no suit, but trousers, waistcoat and Paisley tie fashion for the psychedelic movement of the 1960s.• Ladbroke Grove urban guerilla psychedelic sci-fi warriors probably sums it up.• She was bouncing around in a tent-like dress, patterned in psychedelic swirls of purple and brown.Origin psychedelic (1900-2000) Greek psych- ( → PSYCH-) + deloun “to show” 