Adjective: autumnal o'túm-nul
- Of or characteristic of or occurring in autumn
"the autumnal equinox"; "autumnal fruits"
- Characteristic of late maturity verging on decline
"a serene autumnal mood"
See also: autumn-blooming, autumn-flowering, fall-blooming [N. Amer], fall-flowering [N. Amer], late-blooming, late-flowering, late-ripening, mature
Antonym: summery, vernal, wintery
Encyclopedia: Autumnal