- autumnal - of or characteristic of or occurring in autumn; "the autumnal equinox"; "autumnal fruits"
Antonyms: wintry, wintery, brumal, hibernal, hiemal, vernal, summery, aestival, estival
- autumnal - characteristic of late maturity verging on decline; "a serene autumnal mood"
Antonym: immature (indirect, via mature)