Definition of asteroid noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈæstərɔɪd//
; NAmE NAmE//ˈæstərɔɪd//
The universe
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any one of the many small planets that go around the sun Wordfinderasteroid, astronomy, comet, constellation, cosmic, galaxy, meteorite, orbit, space, the universe See related entries: The universe Word Originearly 19th cent.: from Greek asteroeidēs ‘starlike’, from astēr ‘star’.
See the Oxford Advanced American Dictionary entry: asteroid