an artificial body placed in orbit round the earth or moon or another planet in order to collect information or for communication

a communications satellite

a spy satellite

the report was sent via satellite

a celestial body orbiting the earth or another planet

something that is separated from or on the periphery of something else but is nevertheless dependent on or controlled by it

satellite offices in London and New York

a portion of the DNA of a genome with repeating base sequences and of different density from the main sequence