a. [ L. perennis that lasts the whole year through; per through + annus year. See Per-, and Annual. ]
The perennial existence of bodies corporate. Burke. [ 1913 Webster ]
n. (Bot.) A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not. [ 1913 Webster ]
adv. In a perennial manner. [ 1913 Webster ]