exuberant

adjective3

1. •
   Very cheery and peppy; extremely cheerful, energetic and enthusiastic.

   • He was a man of exuberant fancy, and, withal of an authority so irresistible that, at his will, he turned his varied fancies into facts. — 1882
2. •
   Unusually proliferative, widespread or extreme, particularly in relation to a disease, immune reaction, or tissue
3. •
   (literary) Abundant, luxuriant.

   • It pencilled each flower with rich and variegated hues, and threw over its exuberant foliage a vesture of emerald green. — 1852