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.

3. (Bot.) Continuing more than two years; as, a perennial steam, or root, or plant.

Syn. -- Perpetual; unceasing; never failing; enduring; continual; permanent; uninterrupted.

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.

• active throughout the year or living for many years
  
• a perennial plant