Longman Dictionary of Contemporary English homepage

Date: 1900-2000
Language: Greek
Origin: psych- ( PSYCH-) + deloun 'to show'

psychedelic

 adjective
     
Related topics: Colours and Sounds, Drug Culture
psy‧che‧del‧ic [usually before noun]
1MDD psychedelic drugs such as LSD make you hallucinate (=see things that do not exist)
2C having 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 adverb
—psychedelia noun [uncountable]
Sixties psychedelia
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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