1. Intense joy or delight: After finally reaching the peak of the mountain, Robert went into ecstasies when viewing the horizon and the sky.
2. A state of emotion intense and exalting: When Bob finally met his long-lost love at the airport, he fell into total ecstasy with overwhelming emotions and was in a state of total bliss!
3. The trance or rapture of a mystic or prophetic exaltation: In some denominations, the congregation might be carried away by overwhelming emotions and ecstasy.
4.A medical state in which the body displays an interruption of voluntary motion, mental power, and sensibility: While in a condition of ecstasy, the person is in an erect and inflexible position, while breathing and pulsation are not affected at all.
5. Etymology: from Old French extasie and Late Latin extasis, from Greek ekstasis, a derivative of the verb existanai, "to displace, to drive out of one's mind".

In its original sense, ecstasy referred to a trancelike condition marked by a loss of rational experience and by concentration on a single emotion and now it usually means intense delight.