1. plants that complete their life cycle in two years, typically growing leaves in the first year and flowering and producing seeds in the second year before dying
Usage: botany
2. events, publications, or exhibitions that occur every two years

Examples

• The gardener planted biennials like foxgloves and hollyhocks in the spring.
• Carrots and parsley are common biennials grown in vegetable gardens.
• Many biennials produce only leaves during their first growing season.
• The art museum hosts several prestigious biennials featuring contemporary works.
• Venice and Whitney are famous biennials in the art world.
• These biennials attract visitors from around the globe every other year.