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A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials.
5. a perennial plant. 6. something that is continuing or recurrent. [1635â45; < Latin perenni(s) lasting the whole year through (per- per- + -enn-, comb. form of annus year + -is adj. suffix) + -al1] perâ¢en`niâ¢alâ²iâ¢ty, n. perâ¢enâ²niâ¢alâ¢ly, adv.