noun
- people who are trained to travel and work in outer space
Examples
- The astronauts conducted experiments on the International Space Station.
- NASA selected twelve new astronauts for the Mars mission program.
- The astronauts performed a spacewalk to repair the satellite.
- Three astronauts returned safely to Earth after six months in orbit.
- The astronauts trained for years before their first space mission.
- Young children often dream of becoming astronauts when they grow up.