1) Region beyond Earth 2) Solar system component 
The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets. The asteroid belt is also termed the main asteroid belt or main belt to distinguish its members from other asteroids in the Solar System such...
is the region in space between the orbits of Mars and Jupiter where most asteroids are located.
A 1/2 AU wide region between the orbits of Mars and Jupiter where most asteroids are found.
(from the article `astronomy`) ...million asteroids exist, but most are small, and their combined mass is estimated to be less than a thousandth that of Earth. Most of the ... Although small bodies are found throughout the solar system, most of those known are concentrated in several regions. Those regions in which they ... [2 relate...
A region between the orbits of Mars and Jupiter where the majority of asteroids in the Solar System are to be found. The main asteroid belt extends from 2.15 to 3.3 astronomical units (255 to 600 million km) from the Sun – between Mars (1.5 AU) and Jupiter (5.2 AU) – and may contain over...
a wide gap between the orbits of Mars and Jupiter where most asteroids can be found
Collection of Asteroids in orbit around the Sun.
[n] - the region of interplanetary space between Mars and Jupiter where most asteroids are found
Collection of asteroids orbiting between Mars and Jupiter
noun the region of interplanetary space between Mars and Jupiter where most asteroids are found
the region of space between the orbits of Mars and Jupiter in which most asteroids are located.