ecstasy

Short definition from Wiktionary

Noun

1. 1
   Intense pleasure.
2. 2
   A state of emotion so intense that a person is carried beyond rational thought and self-control.
3. 3
   A trance, frenzy, or rapture associated with mystic or prophetic exaltation.
4. 4
   Violent emotion or distraction of mind; excessive grief from anxiety; insanity; madness.
5. 5
   The drug MDMA, a synthetic entactogen of the methylenedioxyphenethylamine family, especially in a tablet form.
6. 6
   A state in which sensibility, voluntary motion, and (largely) mental power are suspended, and the body is erect and inflexible.
7. 7
   Alternative letter-case form of ecstasy (“drug”).

Verb

1. 1
   To experience intense pleasure.
2. 2
   To cause intense pleasure in.