Meaning : Producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis.
Example :
Psychedelic drugs like psilocybin and mescaline.
Meaning : Having the vivid colors and bizarre patterns associated with psychedelic states.
Example :
A psychedelic painting.
Meaning : (of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair.
Example :
A psychedelic experience.