Per*en"ni*al (?), a. [L. perennis that lasts the whole year through; per through + annus year. See Per-, and Annual.]
1.
ing or continuing through the year; as, perennial fountains.
2.
Continuing without cessation or intermission; perpetual; unceasing; never failing.
The perennial existence of bodies corporate.
Burke.
3. Bot.
Continuing more than two years; as, a perennial steam, or root, or plant.
Syn. -- Perpetual; unceasing; never failing; enduring; continual; permanent; uninterrupted.
© Webster 1913.
Per*en"ni*al, n. Bot.
A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not.
© Webster 1913.