Definitions:

1. (botany) a plant having a life cycle that normally takes two seasons from germination to death to complete noun
   • flowering biennials usually bloom and fruit in the second season
2. having a life cycle lasting two seasons adjective
   • a biennial life cycle
3. occurring every second year adjective
   • they met at biennial conventions

Synonyms:

• biyearly
• two-year

NearBy Words:

• biennially