Asteroid
/ˈæstəˌrɔɪd/
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Definition
(noun) A naturally occurring solid object, which is smaller than a planet and a dwarf planet, larger than a meteoroid and not a comet, that orbits a star and often has an irregular shape.
Sentence Examples
The asteroid broke up into small pieces as it entered Earth's atmosphere.
A rogue asteroid from the Kuiper Belt is on a collision course with the Earth.
CEFR Practice Quiz
The large ____ passed through the solar system at a very high speed.