(historical) Any of a series of Soviet robotic space satellites, especially the first one in 1957. / (dated) Any artificial satellite.

plural of sputnik.

plural of Sputnik. (Alternative letter-case form of sputniks.)

Alternative letter-case form of sputnik. / An adenovirus viral vector vaccine for COVID-19, developed by the Gamaleya Research Institute of Epidemiology and Microbiology in Russia.

The moment when a country or a society realizes that it needs to catch up with apparent technological and scientific developments made by some other country or countries by increasing its investment into education, innovative research and development, etc.

plural of Sputnik moment