Dictionary

astronaut

noun as·tro·naut \ˈas-trə-ˌnt, -ˌnät\

: a person who travels in a spacecraft into outer space

Full Definition of ASTRONAUT

:  a person who travels beyond the earth's atmosphere; also :  a trainee for spaceflight
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Origin of ASTRONAUT

astr- + -naut (as in aeronaut)
First Known Use: 1929

Other Aeronautics/Aerospace Terms

airway, apron, corridor, dirigible, fishtail, flat-hat, vector
ASTRONAUT Defined for Kids

astronaut

noun as·tro·naut \ˈa-strə-ˌnt\

Definition of ASTRONAUT for Kids

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

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