Of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc.

Any psychoactive substance (such as LSD or psilocybin) which, when consumed, causes perceptual changes (sometimes erratic and uncontrollable), visual hallucination, and altered awareness of the body and mind.

(hippie slang) awesome, cool, groovy

plural of psychedelic

Visual stimulation in the form of intense colors and moving patterns.

In a psychedelic manner.

A wild party where the drug acid is taken.

plural of psychedelic crisis

A bad trip

(music) A genre of popular soul music influenced by psychedelic rock and funk.