equinox
noun
equi·nox
| \ ˈē-kwə-ˌnäks
, ˈe-
\
, ˈe-
\
Definition of equinox
1
: either of the two points on the celestial sphere where the celestial equator intersects the ecliptic
2
: either of the two times each year (as about March 21 and September 23) when the sun crosses the equator and day and night are everywhere on earth of approximately equal length
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Examples of equinox in a Sentence
Recent Examples on the Web
History is filled with the rituals, superstitions, recognition and ceremonies associated with winter and summer solstice and the vernal and autumnal equinox. — San Diego Union-Tribune, "Column: Tune in to nature to sense seasons’ subtle changes," 24 Aug. 2019 The most familiar named moon, September's harvest moon refers to the time of year after the northern autumn equinox when crops are gathered. — National Geographic, "Learn about the lunar cycle, as well as the origins of the many names given to each month's full moon.," 15 June 2019 These images were taken on August 12, 2009, a little more than a day after the exact equinox. — Ashley Strickland, CNN, "What's happening inside Saturn's rings? The Cassini mission dove between them to find out," 13 June 2019 Both hemispheres share the sun’s rays equally at the equinox, and night and day are roughly the same length. — Jill Gleeson, Country Living, "What Exactly Is the Spring Equinox?," 19 Mar. 2019 Scottsdale Public Art has activities celebrating the day, but the star is the 130-foot-long bridge designed by Italian architect/artist/philosopher Paolo Soleri, which demonstrates solar movement by marking the equinox and summer solstice. — Sonja Haller, azcentral, "Ultimate Scottsdale, Arizona, bucket list: Top 25 things to do," 9 Feb. 2015 The set follows his first volume of Quiet River, which dropped on the autumn equinox in 2018. — Nick Williams, Billboard, "Listen to Richard Reed Parry Of Arcade Fire's #TBT Mixtape: 'Songs That Stopped Me In My Tracks'," 15 Aug. 2019 This year, for example, the first full Moon after the spring equinox won't happen until April 19, which means Easter falls on the following Sunday, April 21. — Amanda Garrity, Good Housekeeping, "Why Is Easter So Late in 2019? Find Out How the Date Is Determined Each Year," 15 Apr. 2019 And the Persian New Year, known as Nowruz, is still observed by millions on the spring equinox. — Jill Gleeson, Country Living, "What Exactly Is the Spring Equinox?," 19 Mar. 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'equinox.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for equinox
equinox
noun
English Language Learners Definition of equinox
: a day when day and night are the same length
See the full definition for equinox in the English Language Learners Dictionary
equinox
noun
equi·nox
| \ ˈē-kwə-ˌnäks
, ˈe-kwə-\
, ˈe-kwə-\
Kids Definition of equinox
: either of the two times each year (as in spring around March 21 and in fall around September 23) when the sun's center crosses the equator and day and night are everywhere of equal length
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