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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Asteroids—small, rocky masses left over from the formation of the solar system about 4.6 billion years ago—are found concentrated in the main asteroid belt, orbiting around the sun between the paths of Mars and Jupiter. Josh Hammer, MSNBC Newsweek, 1 Apr. 2025 From the main asteroid belt to Earth's atmosphere Meteorites are rocks from space that survive their fiery descent through Earth's atmosphere and reach the ground. Victoria Corless, Space.com, 24 Mar. 2025 They are found concentrated in the main asteroid belt, orbiting around the sun between the paths of Mars and Jupiter. Faisal Kutty, Newsweek, 12 Mar. 2025 De la Fuente Marcos’ paper in September suggested that the object is part of the Arjuna asteroid belt, which is made of small asteroids that have orbits around the sun similar to Earth’s orbit. Ashley Strickland, CNN, 27 Jan. 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 Apr. 2025.

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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