Emily Dickinson Lexicon

autumn (-s, -'s), n. [OFr < L.; see August, adj.] (webplay: sun, summer, winter, year).

1. Harvest; season of maturity; period of gradual decay; [personification] landscape artist who paints the trees with darker fall colors.
2. Fall; third quarter of the year in New England; the months of September, October, and November; season from the fall equinox to the winter solstice; time period between summer and winter in the northern hemisphere.