polar front

noun

Definition of polar front 

: 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

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. Julissa Treviño, Smithsonian, "As Seas Warm, King Penguins’ Food Is Moving Farther Away. That’s a Problem," 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. Julissa Treviño, Smithsonian, "As Seas Warm, King Penguins’ Food Is Moving Farther Away. That’s a Problem," 1 Mar. 2018

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

First Known Use of polar front

1920, in the meaning defined above

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The first known use of polar front was in 1920

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