Perennial1. (a.) Continuing through the year or many years; as, perennial fountains; perpetual.
2. (a.) Continuing without cessation or intermission; perpetual; unceasing; never failing.
3. (a.) Continuing more than two years; as, a perennial steam, or root, or plant.
4. (n.) A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not.
Thesaurus Entries
abiding, age-long, aged, amphibian, ancient, angiosperm, annual, antique, aquatic plant, articulated, biennial, catenated, ceaseless, chattering, chronic, concatenated, connected, constant, continual, continued, continuing, continuous, cosmopolite, cutting, cyclical, deciduous, deciduous plant, dicot, dicotyledon, direct, diuturnal, durable, endless, enduring, ephemeral, eternal, ever-blooming, ever-new, evergreen, everlasting, exotic, featureless, flowering plant, fungus, gametophyte, gapless, gymnosperm, half-hardy, hardy, hydrophyte, immediate, immortal, immutable, imperishable, incessant, indeciduous, interminable, intransient, inveterate, joined, jointless, lasting, lifelong, linked, long-lasting, long-lived, long-standing, long-term, longeval, longevous, machine gun, macrobiotic, monocot, monocotyl, monotonous, never-ending, never-failing, nonstop, of long duration, of long standing, old, oscillating, perdurable, perduring, periodic, permanent, perpetual, persistent, persisting, plant, polycot, polycotyl, polycotyledon, pulsating, rapid, recurrent, regular, remaining, repeated, repetitive, round-the-clock, running, seamless, seed plant, seedling, sempervirent, sempiternal, serried, smooth, spermatophyte, sporophyte, stable, staccato, staying, steadfast, steady, straight, stuttering, sustained, thallophyte, timeless, tough, triennial, twenty-four-hour, unbroken, unceasing, unchanging, undifferentiated, undying, unending, unfading, unfailing, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unrelieved, unremitting, unstopped, unvarying, vascular plant, vegetable, vibrating, vital, weed