spaceman

/ˈspeɪsmæn/
noun
  1. A person who travels in space; an astronaut.
    • My little brother wants to be a spaceman when he grows up.
    • The spaceman floated gently outside the space station.
    • The first spaceman to walk on the moon was Neil Armstrong.
  2. A fictional character from outer space, especially in stories or movies.
    • She dressed up as a spaceman for Halloween.
    • The movie featured a friendly spaceman who visited Earth.
    • In the comic book, the spaceman had green skin and three eyes.