Definition of cosmonaut noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈkɒzmənɔːt//
; NAmE NAmE//ˈkɑːzmənɔːt//
Space travel
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an astronaut from the former Soviet Union See related entries: Space travel Word Origin 1950s: from cosmos, on the pattern of astronaut and Russian kosmonavt.
See the Oxford Advanced American Dictionary entry: cosmonaut