solar wind

noun

: plasma continuously ejected from the sun's surface into and through interplanetary space

Examples of solar wind in a Sentence

Recent Examples on the Web
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One theory suggests Mars lost its water to space as solar wind stripped it from the atmosphere — a process supported by ratios of isotopes on the Red Planet, or distinct species of chemical elements, seen today. Victoria Corless, Space.com, 12 May 2025 One complicating factor in these predictions is the fluctuating puffiness of Earth’s atmosphere, which can swell or shrink based on how much it’s being battered by solar wind and other space weather events. Lee Billings, Scientific American, 7 May 2025 Over time, however, solar wind and radiation likely siphoned away the Martian atmosphere, gradually thinning it to the point where carbon dioxide began transforming into rock. Andrew Paul, Popular Science, 17 Apr. 2025 The space observatory shared a ride with the four small satellites that make up NASA’s PUNCH mission, which will study how the sun's outer atmosphere becomes solar wind. Eric Lagatta, USA TODAY, 12 Mar. 2025 See All Example Sentences for solar wind

Word History

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of solar wind was in 1958

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Cite this Entry

“Solar wind.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/solar%20wind. Accessed 21 May. 2025.

Kids Definition

solar wind

noun
: the continuous radiation of charged particles from the sun's surface

More from Merriam-Webster on solar wind

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