noun
- The 300th anniversary (or the celebration of it.
- synonyms: tercentennial, tercentenary
adjective
- Occurring every third year or lasting 3 years. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). triennial. Retrieved September 20, 2026, from http://smartdefine.org/triennial/definitions/1185743 |
| Chicago | WordNet. 2010. "triennial" http://smartdefine.org/triennial/definitions/1185743 (accessed September 20, 2026). |
| Harvard | WordNet 2010, triennial, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/triennial/definitions/1185743>. |
| MLA | WordNet. "triennial" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/triennial/definitions/1185743> |