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Definition of perennial:

  1. A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not.
  2. Continuing more than two years; as, a perennial steam, or root, or plant.
  3. Continuing without cessation or intermission; perpetual; unceasing; never failing.
  4. ing or continuing through the year; as, perennial fountains.


algal, ongoing, long-lasting, never-failing, continue, old, timeless, aquatic, long, ever, abiding, always, aromatic, barren, hourly, perdurable, bedding plant, clone, arboreal, fadeless, long-lived, climber, deathless, recurrent, continual, bush, alpine, imperishable, long-standing, never-ending, cereal, permanent, ageless, cactus, constantly, annual, bare, at all times, biennial, round-the-clock, bushy, creeping, brassica, dateless, repeated, unfailing, unfading, invariably, without end, necessarily, immortal, ever-living, androgynous, all the while, eonian, bean.

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