asteroid

Pronunciation

• enPR: ăs'tə-roid", IPA ^(key): /ˈæstəroɪd/

• Audio (US)

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Noun

Singular asteroid

Plural asteroids

1. (countable) (astronomy) An asteroid is an object that is smaller than a planet that most often orbits a star, but it can sometimes orbit big planets.

   The asteroid orbited the star.

   The asteroid crossed over Jupiter's orbit.