- any of the small celestial bodies that are thought to orbit the sun, possibly as the remains of comets. When they enter the earth's atmosphere, they become visible as meteors
WordReference Random House Learner's Dictionary of American English © 2026
me•te•or•oid /ˈmitiəˌrɔɪd/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Astronomyany of the small bodies of rock or metal traveling through space that, upon entering the earth's atmosphere, are heated to glowing and become meteors.
me•te•or•oid
(mē′tē ə roid′),USA pronunciation n. [Astron.]
- Astronomyany of the small bodies, often remnants of comets, traveling through space: when such a body enters the earth's atmosphere it is heated to luminosity and becomes a meteor.
- meteor + -oid 1860–65
Collins Concise English Dictionary © HarperCollins Publishers::
meteoroid /ˈmiːtɪəˌrɔɪd/ n
'meteoroid' also found in these entries (note: many are not synonyms or translations):