Biennial originally meant lasting for two yearsnbsp in the 1600s but by 1750 it had also come into use as meaning every two yearsnbsp Think of it this way. Information and translations of every 2 years in the most comprehensive dictionary definitions resource on the web. Beautiful Words To Describe My Daughter Daughter Words Matter Words SHOP Buying Guide M-W Books. . How to use biennial in a sentence. If the last competition was in 2015 then the next competition would be in 2017. Meaning of every 2 years. 30 other terms for every two years- words and phrases with similar meaning. Thesaurus for Every two years. Something that is octennial occurs every eight years. Someone who serves in office for two-year stints. Oct means eight like octopus octogon and enial means years centenial perenial What is something that occurs every 4 years called. Please post if you know the word that describes three times per ye...