astronaut

play
noun as·tro·naut \ˈas-trə-ˌnȯt, -ˌnät\

Definition of astronaut

  1. :  a person who travels beyond the earth's atmosphere; also :  a trainee for spaceflight

Origin and Etymology of astronaut

astr- + -naut (as in aeronaut)


First Known Use: 1928

Other Aeronautics/Aerospace Terms


ASTRONAUT Defined for English Language Learners

astronaut

play
noun as·tro·naut \ˈas-trə-ˌnȯt, -ˌnät\

Definition of astronaut for English Language Learners

  • : a person who travels in a spacecraft into outer space


ASTRONAUT Defined for Kids

astronaut

play
noun as·tro·naut \ˈa-strə-ˌnȯt\

Definition of astronaut for Students

  1. :  a person who travels beyond the earth's atmosphere :  a traveler in a spacecraft



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