autumnal

au·tumn

A0540800 (ô′təm)n.1. The season of the year between summer and winter, during which the weather becomes cooler and many plants become dormant, extending in the Northern Hemisphere from the autumnal equinox to the winter solstice and popularly considered to include the months of September, October, and November; fall. In the Southern Hemisphere autumn includes March, April, and May.2. A period of maturity verging on decline.adj.1. Relating to or occurring in autumn: autumn foliage; autumn harvests.2. Grown during the season of autumn: autumn crops.

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[Middle English autumpne, from Old French autompne, from Latin autumnus.]

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au·tum′nal (ô-tŭm′nəl) adj.au·tum′nal·ly adv.

autumnal

(ɔːˈtʌmnəl) adjof, occurring in, or characteristic of autumn auˈtumnally adv

Thesaurus

Adj.	1.	autumnal - of or characteristic of or occurring in autumn; "the autumnal equinox"; "autumnal fruits"summery - belonging to or characteristic of or occurring in summer; "summery weather"; "summery dresses"vernal - of or characteristic of or occurring in spring; "the vernal equinox"wintery, wintry - characteristic of or occurring in winter; "suffered severe wintry weather"; "brown wintry grasses"
	2.	autumnal - characteristic of late maturity verging on decline; "a serene autumnal mood"mature - characteristic of maturity; "mature for her age"

Translations

秋季的

autumn

(ˈoːtəm) noun (American fall) the season of the year when leaves change colour and fall and fruits ripen. 秋季 秋季autumnal (oːˈtamnəl) adjective 秋季的 秋季的