English dictionary · noun

astronaut

a person trained to travel in a spacecraft

Meaning and definitions

1. a person trained to travel in a spacecraft

Connected roots

• astr-

  star

• naut-

  sailor, ship

Explore the word family

These words share a recorded root connection. A shared root is a learning clue; it does not establish every step in a word’s history.

• astronomy

  the scientific study of celestial objects and the universe

• asteroid

  A naturally occurring solid object, which is smaller than a planet and a dwarf planet, larger than a meteoroid and not a comet, that orbits a star and often has an irregular shape.

• astrology

  Divination about human affairs or natural phenomena from the relative positions of celestial bodies.

• cosmonaut

  An astronaut, especially a Russian or Soviet one.

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