Occurring in or appropriate to the season of autumn.
ETYM Latin auctumnus, autumnus, perh. from a root av to satisfy one's self: cf. French automne. Related to Avarice.
1. The third season of the year, or the season between summer and winter, starting in the northern temperate zone at the autumnal equinox, about September 23, and ends at the winter solstice, about December 23.
2. In popular language, autumn, in America, comprises September, October, and November.
3. The time of maturity or decline; latter portion; third stage.
4. The harvest or fruits of autumn.