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Etymology and origin of the English word astronaut

Confidence
Established
Formation
Compound
First attested
1880 Percy Greg, Across the Zodiac
Ultimate origin
Ancient Greek ἄστρον,ναύτης

Pronunciation

  • UK: /ˈæstɹəˌnɔːt/[1]
  • US: /ˈæstɹəˌnɔt/[1]

Etymology

It is formed from English astro- + -naut,[2][3][4][5] on the pattern of aeronaut,[2][3][4][5] perhaps by way of French astronaute.[6] Astro- goes back to Ancient Greek ἄστρον (ástron, “star”),[2] and -naut to Ancient Greek ναύτης (naútēs, “sailor”),[7][8][9] from ναῦς (naûs, “ship”),[7][10] from Proto-Indo-European *nau- (“boat”).[9] The related French astronautique was coined in 1927 by the science-fiction writer Rosny aîné, on the model of aéronautique,[9][4] and was taken into English as astronautics in 1929.[4]

Earliest recorded meaning

A spacecraft, in fiction: 1880, as the name of the ship in Percy Greg's novel Across the Zodiac.[2][9][4]

Semantic evolution

The sense "space traveller" is recorded from 1928 in the New York Times (the OED and Merriam-Webster),[2][3] while Barnhart and Etymonline date it to 1929, in scientific speculation;[4][9] it became widely known from 1961 through the American space programme.[9][4] The OED also notes an occasional use for an expert in astronautics.[2][3] Since 1990 astronaut has been slang for a high-flying businessperson, especially one who keeps working in East Asia after the family has emigrated, and so spends much time in the air.[2]

Timeline

  • 1880 – a fictional spacecraft.[2][4]
  • 1927 – French astronautique coined.[9][4]
  • 1928 – a person who travels in space.[2][3]
  • 1961 – popularized by the US space programme.[9][4]
  • 1990 – slang, a high-flying businessperson.[2]

Meanings

Noun

  1. A person trained to travel in space, especially as a crew member of a spacecraft.[5][3][2]
  2. (slang) A business person who works in one country while the family lives in another, and so travels often by air.[2]
  • astronautics
  • astronautical
  • aeronaut
  • cosmonaut
  • aquanaut
  • nautical
  • astronomy

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b c d e f g h i j Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  5. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
  6. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  7. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  8. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  9. ^ a b c d e f g h Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  10. ^ Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
Cite this entry

“Astronaut.” Etymologically, 26 Oct. 2026, etymologically.com/en/astronaut. Accessed 27 Oct. 2026.

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