a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects; it was formerly used in psychotherapy but in 1985 it was declared illegal in the United States
Ecstasy is methylenedioxymethamphetamine, or MDMA for short, which is a synthetic, psychoactive (mind-altering) drug with hallucinogenic and amphetamine-like properties.