American Heritage Dictionary
(6)
Century Dictionary
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GNU Webster's 1913
(2)
WordNet
(4)
Elsewhere on the web
Some gardeners make sure a perennial is always "performing."— daytondailynews.com - News
The gardener's definition of a perennial is an herbaceous plant that lives for more than two years.— Summit Daily News - Top Stories
Perennial has been looked up 518 times, favorited once, listed 30 times, and commented on 0 times.

American Heritage Dictionary (1)
Century Dictionary (1)
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