cosmonaut
Americannoun
noun
Other Word Forms
Derived Forms
Etymology
Origin of cosmonaut
1955–60; cosmo- + (aero)naut, representing Russian kosmonávt
Compare meaning
How does cosmonaut compare to similar and commonly confused words? Explore the most common comparisons:
Vocabulary lists containing cosmonaut
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In March 1995 Valeri Polyakov, a Russian cosmonaut, returned to Earth after a record 14 consecutive months in space.
From The Wall Street Journal • Feb. 19, 2026
This late uncertainty is just the most recent twist for the SpaceX Crew-12 mission, which includes Americans Jessica Meir and Jack Hathaway, French astronaut Sophie Adenot and Russian cosmonaut Andrey Fedyaev.
From Barron's • Feb. 5, 2026
Fedyaev will make history as the first cosmonaut to fly twice on Dragon.
From Science Daily • Feb. 2, 2026
Fitting for an artist who once put himself through the physical rigors of cosmonaut training, the show feels like a dialogue between opposing forces — boundlessness and constraint, presence and absence.
From Los Angeles Times • Oct. 16, 2025
According to fellow cosmonaut Yuri Gagarin, Valentina didn't have it easy.
From "Women in Space" by Karen Bush Gibson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
