1. of, characterized by, or generating hallucinations, distortions of perception, altered states of awareness, and occasionally states resembling psychosis.
2. A drug, such as lsd or mescaline, that produces such effects.

1. of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc.
2. having bright colours, abstract shapes, etc. reminiscent of drug-induced hallucinations or distortions of perception.
3. 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. awesome, cool, groovy

1. producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis
2. having the vivid colors and bizarre patterns associated with psychedelic states
3. (of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair