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polar front
noun
: the boundary between the cold air of a polar region and the warmer air of lower latitudes
Examples of polar front in a Sentence
Recent Examples on the Web
Meanwhile, Floridians also were hit by an arctic polar front over the weekend that dropped temperatures below freezing in some areas.
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Josh Hammer, Newsweek, 3 Dec. 2024
This sudden mid-air jolt is caused by wind shear created by the jet stream, specifically the polar front jet stream in northern latitudes.
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Darren Orf, Popular Mechanics, 5 Sep. 2023
The difference in temperatures across the planet—hot at the equator and cold at the poles—causes enormous low-pressure systems and polar fronts, resulting in seasonal windstorms.
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Joe Pappalardo, Popular Mechanics, 8 May 2023
Then a big change will be felt in the temperature department across the state as the combination of Nicole’s circulation and a polar front bring down much cooler air into the state starting on Friday and lasting into the weekend.
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Leigh Morgan, al, 9 Nov. 2022
And those anomalous years offer a preview of how the Southern Ocean is expected to warm in the coming decades, steadily shifting the polar front farther south.
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Eli Kintisch, Science | AAAS, 19 Mar. 2020
The polar front doesn’t stay in the same place every year.
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Eli Kintisch, Science | AAAS, 19 Mar. 2020
Adult penguins take turns to forage for food, traveling hundreds of miles to reach the Antarctic polar front—a nutrient-rich stretch of ocean where cold deep water meets warmer patches.
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Julissa Treviño, Smithsonian, 1 Mar. 2018
In addition to a reliable source of food like the Antarctic polar front, king penguins also need tolerable temperatures, islands with smooth beaches (not rocky ones) and relatively little ice, Hignett writes.
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Julissa Treviño, Smithsonian, 1 Mar. 2018
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Word History
First Known Use
1920, in the meaning defined above
Dictionary Entries Near polar front
Cite this Entry
“Polar front.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polar%20front. Accessed 10 Feb. 2025.
More from Merriam-Webster on polar front
Britannica.com: Encyclopedia article about polar front
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