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Definition of Asteroid
1. Noun. Any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter).
Specialized synonyms: Chiron
Generic synonyms: Minor Planet, Planetoid
Derivative terms: Asteroidal
2. Adjective. Shaped like a star.
Definition of Asteroid
1. n. A starlike body; esp. one of the numerous small planets whose orbits lie between those of Mars and Jupiter; -- called also planetoids and minor planets.
Definition of Asteroid
1. Noun. (astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star ¹
2. Noun. (astronomy) In the Solar system, such a body that orbits within the orbit of Jupiter ¹
3. Noun. (zoology) Any member of the taxonomic class Asteroidea; a starfish ¹
¹ Source: wiktionary.com
Definition of Asteroid
1. a type of celestial body [n -S]
Medical Definition of Asteroid
1. Resembling a star. Origin: G. Aster, star, + eidos, resemblance (05 Mar 2000)