cosmonaut

noun

cos·​mo·​naut ˈkäz-mə-ˌnȯt How to pronounce cosmonaut (audio)
-ˌnät
: an astronaut of the Soviet or Russian space program

Examples of cosmonaut in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Its four crew members are NASA astronauts Commander Matthew Dominick, Pilot Michael Barratt, Mission Specialist Jeanette Epps and Roscosmos cosmonaut Mission Specialist Alexander Grebenkin. Richard Tribou, Orlando Sentinel, 23 Dec. 2024 Along with the noxious smell, the cosmonauts also noticed droplets floating in the air, leading the hatch to the Progress to be immediately shut, and the Russian module closed off to the rest of the ISS while air quality levels were tested and scrubbed. Jess Thomson, Newsweek, 26 Nov. 2024 The space station has hosted rotating crews of cosmonauts and astronauts — hailing from more than 20 countries — since the year 2000 in separate but connected Russian and US sections. Jackie Wattles, CNN, 25 Nov. 2024 The returning crew members during pre-launch training in a Crew Dragon simulator (left to right): cosmonaut Alexander Grebenkin, pilot Mike Barratt, commander Matt Dominick and astronaut Jeanette Epps. William Harwood, CBS News, 23 Oct. 2024 See all Example Sentences for cosmonaut 

Word History

Etymology

Russian kosmonavt, from Greek kosmos + Russian -navt (as in aeronavt aeronaut)

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of cosmonaut was in 1955

Dictionary Entries Near cosmonaut

Cite this Entry

“Cosmonaut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmonaut. Accessed 2 Jan. 2025.

Kids Definition

cosmonaut

noun
cos·​mo·​naut ˈkäz-mə-ˌnȯt How to pronounce cosmonaut (audio)
-ˌnät
: a Soviet or Russian astronaut

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