Definition of autumn equinox in English:

autumn equinox

Line breaks: au¦tumn equi|nox
(also autumnal equinox)

noun

1The equinox in autumn, on about 22 September in the northern hemisphere and 20 March in the southern hemisphere.
More example sentences
  • Sunlight is continuous throughout the summer, but after the solstice the sun slowly sinks to the horizon until it drops below on the autumn equinox.
  • The autumn equinox was 22nd September but I'll be celebrating it with friends and family today.
  • Make a portrait of the north woods in upper Minnesota over the ninety days between the autumn equinox and winter solstice.
1.1 Astronomy The equinox in September.
More example sentences
  • The vernal and autumnal equinoxes occur when the ecliptic crosses the celestial equator, so linking stars, sun and earth through the passage of time.

Definition of autumn equinox in:

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Word of the day internecine
Pronunciation: ˌintərˈnesēn
adjective
destructive to both sides in a conflict