astronaut.

A person trained to travel or work in space.

Use it for

Words that belong together

• mission astronaut
• astronaut training

On the page

The astronaut checked the seal before leaving the module.

Usage notes

Primary category: sci-fi. Forms: Singular astronaut; plural astronauts. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.