asteroid

Pronunciation

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

• Audio (US)

  (file)

Noun

Singular asteroid

Plural asteroids

1. (astronomy) (countable) 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.