autumnal

/ɔˈtʌmnəl/
adjective
  1. Relating to or characteristic of the season of autumn.
    • We took an autumnal walk through the park to enjoy the crisp air.
    • The autumnal colors of red, orange, and gold covered the hillside.
    • The autumnal equinox marks the official start of fall.
  2. Suggesting or resembling the later stage of life; mature or approaching decline.
    • The garden's autumnal phase was still lovely, even as the leaves fell.
    • The novel reflects on the autumnal years of a retired professor.
    • Her autumnal beauty had a quiet dignity that came with age.
Antonyms
What does "autumnal" mean? | whatsthatwordmean | whatsthatwordmean