cosmonaut

noun

cos·​mo·​naut ˈkäz-mə-ˌnȯt 

-ˌnät

: an astronaut of the Soviet or Russian space program

Examples of cosmonaut in a Sentence

Recent Examples on the Web

The Dragon, carrying Williams, Wilmore, NASA astronaut Nick Hague, and Roscosmos cosmonaut Aleksandr Gorbunov, is set to splash down off the Florida coast Tuesday evening. —Diana Leyva, The Tennessean, 2 July 2025

Roscosmos cosmonauts Sergey Ryzhikov and Alexey Zubritskiy measured the flow through their large and small blood vessels, while Kirill Peskov checked the radiation levels on board the space station. —Robert Z. Pearlman, Space.com, 28 June 2025

Farkas launched with the Soviets in 1980, taking along a teddy bear in a cosmonaut suit that went back up with Kapu. —Arkansas Online, 26 June 2025

Also at the station is NASA astronaut Jonny Kim, who reached the outpost in April 2025 with cosmonauts Sergey Ryzhikov and Alexey Zubritsky. —Eric Lagatta, USA Today, 14 June 2025

Word History

Etymology

Russian kosmonavt, from Greek kosmos + Russian -navt (as in aeronavt aeronaut)

First Known Use

1955, in the meaning defined above

Rhymes for cosmonaut

• aeronaut
• aforethought
• afterthought
• apricot
• argonaut
• astronaut
• camelot
• coffeepot
• concordat
• entrepot
• flowerpot
• huguenot

Kids Definition

cosmonaut

noun

cos·​mo·​naut ˈkäz-mə-ˌnȯt 

-ˌnät

: a Soviet or Russian astronaut