1. plural of cosmonaut; astronauts from Russia or the former Soviet Union

Examples

• The cosmonauts completed their six-month mission aboard the space station.
• Three cosmonauts launched from Kazakhstan this morning.
• Russian cosmonauts have logged thousands of hours in space.
• The cosmonauts conducted experiments in zero gravity.
• Both astronauts and cosmonauts work together on international missions.
• The first cosmonauts paved the way for modern space exploration.