Merriam-Webster Collegiate Dictionary - ecstasy

 noun  (plural -sies)  Etymology: Middle English extasie, from Middle French, from Late Latin ecstasis, from Greek ekstasis, from existanai to derange, from ex- out + histanai to cause to stand — more at ex-, stand  Date: 14th century  1.  a. a state of being beyond reason and self-control  b. archaic swoon  2. a state of overwhelming emotion; especially rapturous delight  3. trance; especially a mystic or prophetic trance  4. often capitalized a synthetic amphetamine analog C11H15NO2 used illicitly for its mood-enhancing and hallucinogenic properties — called also MDMA Synonyms:  ~, rapture, transport mean intense exaltation of mind and feelings. ~ and rapture both suggest a state of trance or near immobility produced by an overpowering emotion. ~ may apply to any strong emotion (as joy, fear, rage, adoration) religious ~. rapture usually implies intense bliss or beatitude in speechless rapture. transport applies to any powerful emotion that lifts one out of oneself and usually provokes vehement expression or frenzied action in a transport of rage.