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.
"After accidentally ingesting a contaminated mushroom that contained psychedelic compounds, he spent hours staring at swirling patterns on the wall while feeling completely detached from his own limbs."
producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis
"psychedelic drugs like psilocybin and mescaline"
having the vivid colors and bizarre patterns associated with psychedelic states
"a psychedelic painting"
(of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair
"a psychedelic experience"
Of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc.
"The concert featured a mesmerizing display of swirling lights and kaleidoscopic visuals that felt like a vivid trip through another dimension."
awesome, cool, groovy
"The neon lights at the rave made for a truly psychedelic night out."