Satellite refers to an artificial body placed in orbit around the earth or another planet in order to collect information or for communication.
In a broader sense, satellite can also mean:
1. A celestial body orbiting another larger body (e.g. the Moon is Earth's natural satellite)
2. A small country or organization that is controlled by or depends on a larger, more powerful one
3. A town or community that is near and dependent on a larger city
4. In anatomy, a small structure attached to a larger one