equa·​tor | \ i-ˈkwā-tər How to pronounce equator (audio) , ˈē-ˌkwā- \

Definition of equator

1 : the great circle of the celestial sphere whose plane is perpendicular to the axis of the earth
2 : a great circle of the earth or a celestial body that is everywhere equally distant from the two poles and divides the surface into the northern and southern hemispheres
3a : a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts
b : equatorial plane the equator of a dividing cell

Examples of equator in a Sentence

Recent Examples on the Web This is because salinity decreases near the equator and at both poles. Clare Mulroy, USA TODAY, 24 July 2022 In what appears to be a nice coup, Isar was selected by French space agency CNES for the opportunity to launch at the Diamant launch complex near the equator. Eric Berger, Ars Technica, 22 July 2022 Average global temperatures likely rose 6 to 12 degrees Celsius (about 11 to 22 degrees Fahrenheit) near Earth’s equator, and 10 to 14 degrees Celsius (18 to 25 degrees F) near the poles. Corinne Purtillstaff Writer, Los Angeles Times, 5 July 2022 La Niña is a natural ocean-atmospheric phenomenon marked by cooler-than-average sea surface temperatures across the central and eastern Pacific Ocean, near the equator, which consequently affects weather across the world. Jennifer Gray, CNN, 20 June 2022 People who live further from the equator, both north and south, tend to be diagnosed more. Nikki Brown, PEOPLE.com, 9 June 2022 On Tuesday’s solstice, everywhere north of the equator will receive at least 12 hours of daylight and everywhere south of that point will get less than 12 hours. Aylin Woodward, WSJ, 20 June 2022 In Ecuador's capital of Quito, just barely north of the equator, people barely notice the difference. Forrest Brown, CNN, 20 June 2022 Certain parts of the world south of the equator will be able to witness a partial solar eclipse on Saturday. Maria Jimenez Moya, USA TODAY, 29 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'equator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of equator

14th century, in the meaning defined at sense 1

History and Etymology for equator

Middle English, from Medieval Latin aequator, literally, equalizer, from Latin aequare

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Time Traveler for equator

Time Traveler

The first known use of equator was in the 14th century

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Dictionary Entries Near equator



equator coordinate

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Statistics for equator

Last Updated

9 Aug 2022

Cite this Entry

“Equator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/equator. Accessed 19 Aug. 2022.

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More Definitions for equator


equa·​tor | \ i-ˈkwā-tər How to pronounce equator (audio) \

Kids Definition of equator

: an imaginary circle around the earth everywhere equally distant from the north pole and the south pole


equa·​tor | \ i-ˈkwāt-ər How to pronounce equator (audio) , ˈē-ˌ How to pronounce equator (audio) \

Medical Definition of equator

1 : a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts especially at the place of greatest width the equator of the lens of the eye


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