<p><strong>Noun</strong></p><ul><li>Astronomy. any of millions of small celestial objects revolving around the sun, often irregularly shaped and having a great range in size, from as small as 6 feet (2 meters) across to about 620 miles (998 kilometers) across: the vast majority of known asteroids exist within the asteroid belt.</li><li>small solar system body.</li><li>Zoology. a starfish; an asteroidean.</li></ul><p><strong>Adjective</strong></p><ul><li>starlike.</li></ul>