ecstatic

Short definition from Wiktionary

Adjective

1. 1
   Feeling or characterized by ecstasy.
2. 2
   Extremely happy.
3. 3
   Relating to, or caused by, ecstasy or excessive emotion.

Noun

1. 1
   Transports of delight; words or actions performed in a state of ecstasy.
2. 2
   A person in a state of ecstasy.