exuberant

adj

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

   “exuberant feeling”

   “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.”

   “She was a tall, earthy, exuberant girl with long hair and a pretty face.”

2. (literary)Abundant, luxuriant.

   “exuberant foliage”

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

   “The County Architect's Department is starting to pleach trees to open up these vistas, now almost hidden by the exuberant growth.”

3. Unusually proliferative, widespread or extreme, particularly in relation to a disease, immune reaction, or tissue