asteroid belt

noun

: the region of interplanetary space between the orbits of Mars and Jupiter in which most asteroids are found

Examples of asteroid belt in a Sentence

Recent Examples on the Web
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Like all but one of the newfound superfast rotators, the record-setting space rock, called 2025 MN45, resides in the main asteroid belt between Mars and Jupiter. Mike Wall, Space.com, 8 Jan. 2026 Most reside in the main asteroid belt between the orbits of Mars and Jupiter. Eric Lagatta, AZCentral.com, 12 Dec. 2025 They’re found concentrated in the main asteroid belt, which lies around the sun between the orbits of Mars and Jupiter. Soo Kim, MSNBC Newsweek, 11 Dec. 2025 The team, led by planetary scientist Julio Fernández of the Universidad de la República in Uruguay, focused on the collisionally active portion of the asteroid belt. Chris Young, Interesting Engineering, 3 Oct. 2025 See All Example Sentences for asteroid belt

Word History

First Known Use

1867, in the meaning defined above

Time Traveler
The first known use of asteroid belt was in 1867

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Cite this Entry

“Asteroid belt.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/asteroid%20belt. Accessed 15 Jan. 2026.

Kids Definition

asteroid belt

noun
: the region of interplanetary space between the orbits of Mars and Jupiter in which most asteroids are found

More from Merriam-Webster on asteroid belt

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