pe·ren·ni·al /pəˈrɛnɪəl/ 形容詞
1. Lasting 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.
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.
adj 1: lasting three seasons or more; "the common buttercup is a
popular perennial plant" [ant: annual, biennial]
2: lasting an indefinitely long time; suggesting self-renewal;
3: recurring again and again; "perennial efforts to stipulate
the requirements" [syn: recurrent, repeated]
n : a plant lasting for three seasons or more