the third season of the year, when crops and fruits are gathered and leaves fall, in the northern hemisphere from September to November and in the southern hemisphere from March to May : the countryside is ablaze with color in autumn | [as adj. ] autumn leaves | figurative he was in the autumn of his life.
• Astronomy the period from the autumnal equinox to the winter solstice.
ORIGIN late Middle English : from Old French autompne, or later directly from Latin autumnus.” New Oxford American Dictionary
What’s autumn for you?