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.
A small, irregularly shaped rock of iron and nickel, many of which are located in the Asteroid Belt. The largest asteroids are Ceres (900-km diameter), Pallas (500-km diameter), and Vesta (500-km diameter).
Large solid mass suspended in outer space that revolves around the sun. Asteroids are larger than meteoroids.
Small, rocky bodies that orbit the Sun, asteroids range in diameter from a few millimeters to over 250 km. Although all asteriods reflect sunlight, only one, Vesta, can be seen with the unaided eye.
a bit of rock
a flying mountain
a large rock in outer space
a rock-like object with an irregular shape