sputnikPronunciation: /ˈspʊtnɪk, ˈspʌt-/Definition of sputnik noun each of a series of Soviet artificial satellites, the first of which (launched on 4 October 1957) was the first satellite to be placed in orbit. Origin:Russian, literally 'fellow-traveller'sputnik in other Oxford dictionaries Definition of sputnik in the US English dictionary
