·adj ing or continuing through the year; as, perennial fountains.
II. Perennial ·adj Continuing more than two years; as, a perennial steam, or root, or plant.
III. Perennial ·adj Continuing without cessation or intermission; perpetual; unceasing; never failing.
IV. Perennial ·noun A perennial plant; a plant which lives or continues more than two years, whether it retains its leaves in winter or not.