perennial perennial /pɝˈɛniːəl/

adjective

1. () (botany) lasting three seasons or more  ( perennial )
   (botany) lasting three seasons or more
    The common buttercup is a popular perennial plant
   the common buttercup is a popular perennial plant
   
2. Recurring again and again  ( perennial , recurrent , repeated )
   recurring again and again
    Perennial efforts to stipulate the requirements
   perennial efforts to stipulate the requirements
   
3. Lasting an indefinitely long time; suggesting self-renewal  ( perennial )
   lasting an indefinitely long time; suggesting self-renewal
    Perennial happiness
   perennial happiness
   

noun

1. (botany) a plant lasting for three seasons or more  ( perennial )
   (botany) a plant lasting for three seasons or more
    Peonies are a beautiful perennial that come back year after year
   Peonies are a beautiful perennial that come back year after year