(adv.) Once in two years.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). biennially. Retrieved September 24, 2026, from http://smartdefine.org/biennially/definitions/1980170 |
| Chicago | Webster's. 2011. "biennially" http://smartdefine.org/biennially/definitions/1980170 (accessed September 24, 2026). |
| Harvard | Webster's 2011, biennially, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/biennially/definitions/1980170>. |
| MLA | Webster's. "biennially" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/biennially/definitions/1980170> |