Share this entry

Share this page

autumn equinox

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

Definition of autumn equinox in English:

noun

1The equinox in autumn, on about 22 September in the northern hemisphere and 20 March in the southern hemisphere.
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.
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:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day verbose
Pronunciation: vəːˈbəʊs
adjective
using more words than are needed…