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 seven astronauts and cosmonauts that comprise the second half of the International Space Station's Expedition 73 crew focused this week on a new shipment of supplies and conducting the time-sensitive science that arrived along with the cargo.
—
Robert Z. Pearlman, Space.com, 29 Aug. 2025
Also aboard the station is NASA astronaut Jonny Kim, who reached the ISS in April with cosmonauts Sergey Ryzhikov and Alexey Zubritsky.
—Eric Lagatta, USA Today, 19 Aug. 2025
Roscomos cosmonaut Aleksandr Gorbunov making his first flight.
—Richard Tribou, The Orlando Sentinel, 18 Aug. 2025
Platonov, a 39-year-old spaceflight rookie, was a fighter pilot in the Russian Air Force before training to become a cosmonaut.
—Stephen Clark, ArsTechnica, 1 Aug. 2025
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Robert Z. Pearlman, Space.com, 29 Aug. 2025
Also aboard the station is NASA astronaut Jonny Kim, who reached the ISS in April with cosmonauts Sergey Ryzhikov and Alexey Zubritsky.
—Eric Lagatta, USA Today, 19 Aug. 2025
Roscomos cosmonaut Aleksandr Gorbunov making his first flight.
—Richard Tribou, The Orlando Sentinel, 18 Aug. 2025
Platonov, a 39-year-old spaceflight rookie, was a fighter pilot in the Russian Air Force before training to become a cosmonaut.
—Stephen Clark, ArsTechnica, 1 Aug. 2025
See All Example Sentences for cosmonaut
Cite this Entry
“Cosmonaut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmonaut. Accessed 9 Sep. 2025.
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cosmonaut
noun
cos·mo·naut
ˈkäz-mə-ˌnȯt
-ˌnät
: a Soviet or Russian astronaut
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