|Origin:||psych- ( PSYCH-) + deloun 'to show'|
psy‧che‧del‧ic [usually before noun]
psychedelic drugs such as LSD make you hallucinate (=see things that do not exist)
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.
—psychedelia noun [uncountable]