1. [adjective] Of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc.
2. [adjective] (of graphics, etc.) Having bright colours, abstract shapes, etc. reminiscent of drug-induced hallucinations or distortions of perception.
3. [noun] 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.
4. [interjection] (hippie slang) awesome, cool, groovy
5. [adjective] Producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis; 'psychedelic drugs like psilocybin and mescaline'.
6. [adjective] Having the vivid colors and bizarre patterns associated with psychedelic states; 'a psychedelic painting'.
7. [adjective] (of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair; 'a psychedelic experience'.
