Dictionary

cosmonaut

cosmonaut

noun cos·mo·naut \ˈkäz-mə-ˌnt, -ˌnät\

: an astronaut in the space program of Russia or the former Soviet Union

Full Definition of COSMONAUT

:  an astronaut of the Soviet or Russian space program

Origin of COSMONAUT

Russian kosmonavt, from Greek kosmos + Russian -navt (as in aeronavt aeronaut)
First Known Use: 1955

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