satellite
/ˈsætəlaɪt/noun
A machine sent into orbit around the Earth or another body in space, usually to send back signals or data.
Example sentences
- “Weather satellites track the hurricane as it moves across the ocean.”
- “The phone company launched a new satellite to improve internet coverage.”
Natural moons are satellites too: the Moon is Earth's. As a modifier it means dependent and outlying: satellite towns, a satellite office.