astronomical
adjective
as·tro·nom·i·cal
ˌa-strə-ˈnä-mi-kəl 
variants
or less commonly astronomic
1
: of or relating to astronomy
astronomical observations
2
: enormously or inconceivably large or great
astronomical numbers
an astronomical price
Synonyms of astronomical
Examples of astronomical in a Sentence
The cost of the office building was astronomical.
We got an astronomical telephone bill this month.
Recent Examples on the Web
Mostly Mute Monday tells an astronomical story in images, visuals, and no more than 200 words.
—
Big Think, 9 Feb. 2026
The winter sky is filled with astronomical wonders that are worth braving the cold to see.
—Michele Laufik, Martha Stewart, 9 Feb. 2026
And because this debt is usually due within months, an equivalent annual interest rate can be astronomical.
—Scott Horsley, NPR, 9 Feb. 2026
Of course, there are other challenges associated with operating in space, such as protecting hardware from the sun’s radiation and transmitting astronomical amounts data from orbit to earth.
—Jason Ma, Fortune, 6 Feb. 2026
See All Example Sentences for astronomical
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Big Think, 9 Feb. 2026
The winter sky is filled with astronomical wonders that are worth braving the cold to see.
—Michele Laufik, Martha Stewart, 9 Feb. 2026
And because this debt is usually due within months, an equivalent annual interest rate can be astronomical.
—Scott Horsley, NPR, 9 Feb. 2026
Of course, there are other challenges associated with operating in space, such as protecting hardware from the sun’s radiation and transmitting astronomical amounts data from orbit to earth.
—Jason Ma, Fortune, 6 Feb. 2026
See All Example Sentences for astronomical
Cite this Entry
“Astronomical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astronomical. Accessed 14 Feb. 2026.
Copy CitationKids Definition
astronomical
adjective
as·tro·nom·i·cal
ˌas-trə-ˈnäm-i-kəl
variants
also astronomic
1
: of or relating to astronomy
2
: extremely or unbelievably large
the cost was astronomical
Love words? Need even more definitions?
Merriam-Webster unabridged
