Webster's Revised Unabridged Dictionary · 1913

Autumnal

Autumnal ({not transcribed}) , adjective

[Latin auctumnalis, autumnalis: compare French automnal.]

1.
Of, belonging to, or peculiar to, autumn; as, an autumnal tint; produced or gathered in autumn; as, autumnal fruits; flowering in autumn; as, an autumnal plant.
Thick as autumnal leaves that strow the brooks In Vallombrosa. — Milton
2.
Past the middle of life; in the third stage.
An autumnal matron. — Hawthorne
Collocations (3)
Autumnal equinox , the time when the sun crosses the equator, as it proceeds southward, or when it passes the autumnal point.
Autumnal point , the point of the equator intersected by the ecliptic, as the sun proceeds southward; the first point of Libra.
Autumnal signs , the signs Libra, Scorpio, and Sagittarius, through which the sun passes between the autumnal equinox and winter solstice.