What is triannual?

Triannual refers to something that occurs three times a year or every three years. It can also refer to a publication that is issued three times a year, such as a triannual magazine or journal. Triannual events or conferences occur every three years, bringing people together for a significant gathering. The use of the term “triannual” is less common than “biannual” or “semi-annual,” which means twice a year.