autumnal

[ aw-tuhm-nl ]

/ ɔˈtʌm nl /

belonging to or suggestive of autumn; produced or gathered in autumn: autumnal colors.

past maturity or middle life.

Origin of autumnal

From the Latin word autumnālis, dating back to 1630–40. See autumn, -al¹

au·tum·nal·ly, adverb un·au·tum·nal, adjective

Colors were vivid and autumnal, including fuchsia and olive green with metallic shimmers.

Valentino, Chanel, and Alexander McQueen at Paris Fashion Week |Liza Foreman |March 4, 2014 |DAILY BEAST
These are autumnal deaths to expiate the sins of a people and appease the heavens so summer might return.

Three Great Men Died That Day: JFK, C.S. Lewis, and Aldous Huxley |John Garth |November 3, 2013 |DAILY BEAST
The pumpkin seeds, trapped in the heat of the caramel, are imbued with an autumnal, resiny resonance.

Pumpkin Seed Brittle |The Daily Beast |November 25, 2008 |DAILY BEAST
There were autumnal fevers too, and a contagious and destructive throat-distemper,—diseases unwritten in medical hooks.

Old News |Nathaniel Hawthorne

In the west the rosy tints of the autumnal sunset were still warm in the sky.

The Naval History of the United States |Willis J. Abbot.
Does not this earth teem with them—the autumnal winds moan with them?

Blackwood's Edinburgh Magazine, Volume 54, No. 337, November, 1843 |Various
Paris is a charming place after the heat of the summer has passed away, and the fine, clear, autumnal days arrive.

Jorrocks' Jaunts and Jollities |Robert Smith Surtees
The valley of the Connecticut was decked with harvest products as for an autumnal pageant.

Steve and the Steam Engine |Sara Ware Bassett

autumnal

/ (ɔːˈtʌmnəl) /

of, occurring in, or characteristic of autumn

autumnally, adverb