Past the middle of life; in the third stage.(adjective)
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Use "autumnal" in a sentence
"And the only place it feels remotely autumnal is in the mall."
"So the piece is done in autumnal, slightly Hallowe'eny colours with spider webs stitched in each square and some inspirational words and faces."
"ABOUT THREE YEARS ago I began to notice that the natural arc both of my reading and my writing was suffering what might be called an autumnal change."