Meaning of “satellite” - Learner’s Dictionary

satellite

noun [ C ] uk us /ˈsætəlaɪt/
INFORMATION

B2 a piece of equipment that is sent into space around the Earth to receive and send signals or to collect information:

a spy/weather satellite
SPACE

a natural object that moves around a planet in space:

The moon is the Earth's satellite.

(Definition of “satellite” from the Cambridge Learner’s Dictionary © Cambridge University Press)