cosmonaut
noun
cos·mo·naut
ˈkäz-mə-ˌnȯt 
-ˌnät
: an astronaut of the Soviet or Russian space program
Examples of cosmonaut in a Sentence
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The returning group, which includes American astronauts Mike Fincke and Zena Cardman, Japan Aerospace Exploration Agency astronaut Kimiya Yui, and Roscosmos cosmonaut Oleg Platonov, makes up NASA’s SpaceX Crew-11.
—
Jackie Wattles, CNN Money, 8 Jan. 2026
Because of the ever-present chance that a Soyuz or Crew Dragon might have to depart early, NASA and Roscosmos, the Russian federal space agency, agreed to fly one NASA astronaut aboard each Soyuz and one Russian cosmonaut aboard each Crew Dragon.
—William Harwood, CBS News, 8 Jan. 2026
American astronauts Zena Cardman and Mike Fincke, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui and Roscosmos cosmonaut Oleg Platonov make up the Crew-11 team, according to NASA.
—Gabrielle Rockson, PEOPLE, 8 Jan. 2026
The space station has three other members on board, including NASA’s Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergey Mikaev, who flew to the station on a Soyuz spacecraft in November.
—Richard Tribou, The Orlando Sentinel, 8 Jan. 2026
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Jackie Wattles, CNN Money, 8 Jan. 2026
Because of the ever-present chance that a Soyuz or Crew Dragon might have to depart early, NASA and Roscosmos, the Russian federal space agency, agreed to fly one NASA astronaut aboard each Soyuz and one Russian cosmonaut aboard each Crew Dragon.
—William Harwood, CBS News, 8 Jan. 2026
American astronauts Zena Cardman and Mike Fincke, JAXA (Japan Aerospace Exploration Agency) astronaut Kimiya Yui and Roscosmos cosmonaut Oleg Platonov make up the Crew-11 team, according to NASA.
—Gabrielle Rockson, PEOPLE, 8 Jan. 2026
The space station has three other members on board, including NASA’s Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergey Mikaev, who flew to the station on a Soyuz spacecraft in November.
—Richard Tribou, The Orlando Sentinel, 8 Jan. 2026
See All Example Sentences for cosmonaut
Cite this Entry
“Cosmonaut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmonaut. Accessed 11 Jan. 2026.
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cosmonaut
noun
cos·mo·naut
ˈkäz-mə-ˌnȯt
-ˌnät
: a Soviet or Russian astronaut
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