noun
- In the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400.
- synonyms: leap year, intercalary year, bissextile year
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). 366 days. Retrieved September 20, 2026, from http://smartdefine.org/366_days/definitions/1254170 |
| Chicago | WordNet. 2010. "366 days" http://smartdefine.org/366_days/definitions/1254170 (accessed September 20, 2026). |
| Harvard | WordNet 2010, 366 days, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/366_days/definitions/1254170>. |
| MLA | WordNet. "366 days" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/366_days/definitions/1254170> |