Psychedelic/ˌsaɪkəˈdelɪk/ Definition 1 of 4Pro Tip 1/3Drug Reference Used when discussing the effects drugs have on perception; often used metaphorically. The light show was so vivid, it felt psychedelic. Pro Tip 2/31960s Culture Evokes the 1960s era of art and music, which often featured this style. The band's psychedelic sound is reminiscent of the '60s. Pro Tip 3/3Vivid Imagery Describes artworks or visual designs with bright, swirling patterns. His poster featured psychedelic colors that caught everyone's eye.