noun

1. A moon or other smaller body orbiting a larger one.

   “A spent upper stage is a derelict satellite.”

2. A man-made apparatus designed to be placed in orbit around a celestial body, generally to relay information, data etc. to Earth.

   “Many telecommunication satellites orbit at 36000km above the equator.”

3. A country, state, office, building etc. which is under the jurisdiction, influence, or domination of another body.

Synonyms: sat

verb

1. To transmit by satellite.