astronaut.
A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose.
Meaning & usage
A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose.
A member of the crew of a spaceship or other spacecraft that travels beyond Earth's atmosphere, or someone trained to serve that purpose. An American space traveler, when contrasted against equivalent terms from other countries such as cosmonaut, taikonaut, spationaut, and vyomanaut.
A person (typically man) working abroad away from their family.
Where this word comes from
From astro- + -naut. Coined from Ancient Greek ἄστρον (ástron, “star”) and ναύτης (naútēs, “sailor”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.