From WordNet (r) 3.0 (2006):
exuberant adj 1: joyously unrestrained [syn: ebullient, exuberant, high-spirited] 2: unrestrained, especially with regard to feelings; "extravagant praise"; "exuberant compliments"; "overweening ambition"; "overweening greed" [syn: excessive, extravagant, exuberant, overweening] 3: produced or growing in extreme abundance; "their riotous blooming" [syn: exuberant, lush, luxuriant, profuse, riotous]