Definition of cosmonaut in English:

cosmonaut

Syllabification: cos·mo·naut
Pronunciation: /ˈkäzməˌnôt, -ˌnät
 
/

noun

A Russian astronaut.
More example sentences
  • In its second year of occupancy, astronauts and cosmonauts have conducted 16 spacewalks for maintenance and assembly of the Station.
  • Do we have an option of giving any degree of privacy to this planet's astronauts, cosmonauts, and taikonauts?
  • We don't really have much time for a social life - there's a lot of work to get through - but we meet Russian cosmonauts and American astronauts, too.

Origin

1950s: from cosmos1, on the pattern of astronaut and Russian kosmonavt.

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