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satellite

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satellite
satellite W3 /ˈsætəlaɪt, ˈsætɪlaɪt/ noun [countable]
 Date: 1500-1600
 Language: French
 Origin: Latin satelles 'personal servant or guard'

1. a machine that has been sent into space and goes around the Earth, moon etc, used for radio, television, and other electronic communication:
    the launch of a communications and weather satellite
    via/by satellite (=using a satellite)
    This broadcast comes live via satellite from New York.
2. a natural object that moves around a planet:
    The moon is a satellite of the Earth.
3. a country, area, or organization that is controlled by or is dependent on another larger one:
    the former Soviet satellite country of Lithuania
4. a town that has developed next to a large city:
    We stayed in Aurora, a satellite suburb of Chicago.