Meaning & use
cosmonaut
An astronaut trained by the Russian or former Soviet space program.
See it in a sentence
The cosmonaut spent six months aboard the space station conducting experiments.
Yuri Gagarin became the first cosmonaut to orbit the Earth in 1961.
A note on using this word
Cosmonaut is specifically used for Russian and Soviet space travelers, while astronaut is the general term used elsewhere, including the United States.
Words with a similar meaning
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