- (n.) The time of maturity or decline; latter portion; third stage.
- (n.) The third season of the year or the season between summer and winter, often called "the fall." Astronomically, it begins in the northern temperate zone at the autumnal equinox, about September 23, and ends at the winter solstice, about December 23; but in popular language, autumn, in America, comprises September, October, and November.
- (n.) The harvest or fruits of autumn.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). autumn. Retrieved September 25, 2026, from http://smartdefine.org/autumn/definitions/1977359 |
| Chicago | Webster's. 2011. "autumn" http://smartdefine.org/autumn/definitions/1977359 (accessed September 25, 2026). |
| Harvard | Webster's 2011, autumn, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/autumn/definitions/1977359>. |
| MLA | Webster's. "autumn" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/autumn/definitions/1977359> |