biyearly (Adjective) — Occurring every second year. ex. "they met at biyearly conventions"
biyearly (Adjective) — Occurring or payable twice each year. ex. "You must submit biyearly compliance reports"
biyearly (Adverb) — Every two years. ex. "this festival takes places biyearly"
biyearly (Adverb) — Twice a year.