Noun
a person trained to travel in a spacecraft
Source: WordNetIn my writing I am acting as a map maker, an explorer of psychic areas, a cosmonaut of inner space, and I see no point in exploring areas that have already been thoroughly surveyed. William S. Burroughs
I'm a fully trained cosmonaut and have completed 800 hours training, which has made me the No. 1 civilian reserve ready to visit the International Space Station. I am determined to go up, and I want to explore the Moon, Mars and beyond! Brian Blessed
the Russians called their astronauts cosmonauts Source: Internet
Beschloss 1997, p. 55 On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to fly in space, reinforcing American fears about being left behind in a technological competition with the Soviet Union. Source: Internet
In this handout photo released by Gagarin Cosmonaut Training Centre (GCTC), Roscosmos space agency, a search and rescue team works on the site of landing of the Soyuz MS-15 space capsule near Kazakh town of Dzhezkazgan, Kazakhstan, Friday, April 17, 2020. Source: Internet
Dryden preferred "cosmonaut", on the grounds that flights would occur in the cosmos (near space), while the "astro" prefix suggested flight to the stars. Source: Internet