perennial

Adjective

• recurring again and again
  • perennial efforts to stipulate the requirements
    

• lasting an indefinitely long time; suggesting self-renewal
  • perennial happiness
    

• lasting three seasons or more
  • the common buttercup is a popular perennial plant
    

Noun

• (botany) a plant lasting for three seasons or more

Related words

• Synonyms: 
  recurrent , repeated
• Antonyms: 
  annual , one-year , biennial , two-year