Synonyms: half-yearly, semiannual, biannual, biyearly
Definition: occurring or payable twice each year
Similar words: periodic, periodical
Definition: happening or recurring at regular intervals
Usage: the periodic appearance of the seventeen-year locust
Definition: occurring every second year
Usage: they met at biennial conventions
Similar words: periodic, periodical
Definition: happening or recurring at regular intervals
Usage: the periodic appearance of the seventeen-year locust