noun
- The first day of April which is celebrated by playing practical jokes.
- synonyms: April Fools', April Fools' day
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). all fools' day. Retrieved September 21, 2026, from http://smartdefine.org/all_fools%27_day/definitions/1326263 |
| Chicago | WordNet. 2010. "all fools' day" http://smartdefine.org/all_fools%27_day/definitions/1326263 (accessed September 21, 2026). |
| Harvard | WordNet 2010, all fools' day, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/all_fools%27_day/definitions/1326263>. |
| MLA | WordNet. "all fools' day" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/all_fools%27_day/definitions/1326263> |