as·​tro·​naut | \ ˈa-strə-ˌnȯt How to pronounce astronaut (audio) , -ˌnät \

Definition of astronaut

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

Examples of astronaut in a Sentence

Recent Examples on the Web Amplifying tension and competition between the two superpowers, For All Mankind never loses focus on its characters, including an astronaut played by Joel Kinnaman of The Killing. Megan Jones, Chicago Tribune, 3 May 2022 After decades of training and research, the mission to create the first lunar colony is about to launch with Anderson as lead astronaut. Manori Ravindran, Variety, 29 Apr. 2022 Wilson alumni included an astronaut and athletes who competed at the summer Olympic Games for every U.S. team going back to Helsinki in 1952. New York Times, 28 Apr. 2022 Barbie has been everything from a secretary to an astronaut and a first lady. Lianne Kolirin, CNN, 27 Apr. 2022 Samantha Cristoforetti, an Italian astronaut with the European Space Agency, joined them. Washington Post, 27 Apr. 2022 Currently, KNaCK weighs 40 pounds, but the team is envisioning that the tech could be small enough to fit on an astronaut's helmet, per Interesting Engineering. Elizabeth Gamillo, Smithsonian Magazine, 25 Apr. 2022 An astronaut hangs above Charles Street and Mount Royal as the city prepares for Artscape. Christina Tkacik, Baltimore Sun, 19 Apr. 2022 Since her launch in 1959, Barbie has been at the forefront of practically every trend, with stints as an astronaut, photojournalist, rockstar, computer programmer, and even presidential candidate. Cailey Rizzo, Travel + Leisure, 18 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'astronaut.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of astronaut

1928, in the meaning defined above

History and Etymology for astronaut

astr- + -naut (as in aeronaut)

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Time Traveler for astronaut

Time Traveler

The first known use of astronaut was in 1928

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Dictionary Entries Near astronaut




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Statistics for astronaut

Last Updated

11 May 2022

Cite this Entry

“Astronaut.” Dictionary, Merriam-Webster, Accessed 16 May. 2022.

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More Definitions for astronaut


as·​tro·​naut | \ ˈa-strə-ˌnȯt How to pronounce astronaut (audio) \

Kids Definition of astronaut

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

More from Merriam-Webster on astronaut

Nglish: Translation of astronaut for Spanish Speakers

Britannica English: Translation of astronaut for Arabic Speakers Encyclopedia article about astronaut


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