DictionarybiennialTwo-year recurrence
adjective / noun

biennial

by-EN-ee-ul/baɪˈeniəl/

Covering or completing a cycle of two years.

The trophy's biennial appearance leaves the intervening years empty.

Five consecutive year cards show the same trophy-and-laurel emblem in 2024, 2026, and 2028, with intervening years empty, making a recurring two-year interval visible.
Etymology

The pieces describe a two-year period. The adjective first meant lasting two years, then came to describe something recurring at two-year intervals.

In context

ThinkTech Hawaii8:40
every two years it's a biennial charge
Condominium Resources (Condo Insider)

More examples

  • Parsley is commonly grown as a biennial.
  • The committee publishes a biennial report.
  • These biennials usually flower in their second year.

Forms

biennial · biennials

Similar words

annual
Occurs every year or completes its life in one year.
perennial
A plant living for several years, or something enduring.