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Syllabification: as·tro·naut
Pronunciation: /ˈastrəˌnôt

Definition of astronaut in English:


A person who is trained to travel in a spacecraft.
Example sentences
  • How much food do we need to have on the spacecraft for the astronauts to go to Mars?
  • I always really enjoy explaining how space travel works and how you train for a space mission as an astronaut.
  • It will be the second time American astronauts return to Earth in a Soyuz spacecraft.


1920s: from astro-, on the pattern of aeronaut and aquanaut.



Pronunciation: /ˌastrəˈnôtikəl/
Example sentences
  • ‘John has a deep interest in astronautical science and has the hands-on experience to back up what he has taught in the classroom,’ said Administrator O'Keefe.
  • Between the point where we are today and the point where starry-eyed dreamers can pick up a catalog full of rocket engines and astronautical instruments there are a number of important things that need to happen.
  • He holds bachelor's and master's degrees in aeronautical and astronautical engineering from Ohio State University.

Definition of astronaut in:

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Word of the day orthoepy
Pronunciation: ˈɔːθəʊɛpi
the correct or accepted pronunciation of words