autumnal equinox

1. 1.

   September 22

   SynonymsSeptember equinoxfall equinox

   Antonymsvernal equinox

   Broaderequinox

   Part offallSeptember
2. 2.

   (astronomy) the equinoctial point that lies in the constellation of Virgo

   Broaderequinoctial point

   astronomy

Questions about autumnal equinox

What does autumnal equinox mean?

autumnal equinox means "September 22". That is the primary sense; the word has 2 in total, listed in full on this page.

What is another word for autumnal equinox?

Close synonyms include September equinox, fall equinox. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

What is the opposite of autumnal equinox?

The recorded antonyms are vernal equinox.

Is autumnal equinox a common word?

autumnal equinox is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.