AUTUMNAL EQUINOX

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 Dictionary entry overview: What does autumnal equinox mean? 

• AUTUMNAL EQUINOX (noun)
  The noun AUTUMNAL EQUINOX has 2 senses:

1. September 22

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

  Familiarity information: AUTUMNAL EQUINOX used as a noun is rare.

 Dictionary entry details 

• AUTUMNAL EQUINOX (noun)

Sense 1

Meaning:

September 22

Classified under:

Nouns denoting time and temporal relations

Synonyms:

autumnal equinox; fall equinox; September equinox

Hypernyms ("autumnal equinox" is a kind of...):

equinox (either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length)

Holonyms ("autumnal equinox" is a part of...):

Sep; Sept; September (the month following August and preceding October)

autumn; fall (the season when the leaves fall from the trees)

Antonym:

vernal equinox (March 21)

Sense 2

Meaning:

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

Classified under:

Nouns denoting spatial position

Hypernyms ("autumnal equinox" is a kind of...):

equinoctial point; equinox ((astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic)

Domain category:

astronomy; uranology (the branch of physics that studies celestial bodies and the universe as a whole)

 Context examples 

The season between the autumnal equinox and the winter solstice.

(Autumn, NCI Thesaurus)