Definitions
1.NounA member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose.
An American space traveler, when contrasted against equivalent terms from other countries such as cosmonaut, taikonaut, spationaut, and vyomanaut.
2.NounAn American space traveler, when contrasted against equivalent terms from other countries such as cosmonaut, taikonaut, spationaut, and vyomanaut.
3.NounA person (typically man) working abroad away from their family.