- (interj.) An expression of frolic and exultation, and sometimes of wonder.
- (n.) The time of triumph and exultation; hence, joy, high spirits, frolicsomeness; wildness.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). heyday. Retrieved September 21, 2026, from http://smartdefine.org/heyday/definitions/2016446 |
| Chicago | Webster's. 2011. "heyday" http://smartdefine.org/heyday/definitions/2016446 (accessed September 21, 2026). |
| Harvard | Webster's 2011, heyday, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/heyday/definitions/2016446>. |
| MLA | Webster's. "heyday" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/heyday/definitions/2016446> |