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
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
Although parts of California have already experienced triple-digit temperatures, the new season doesn’t officially arrive until the summer solstice — an astronomical event that marks the longest day of the year.
—
Hannah Poukish, Sacbee.com, 8 June 2025
The summer solstice is an astronomical event marking the official start of summer in the Northern Hemisphere.
—Emese MacZko, Forbes.com, 6 June 2025
Cheng and his colleagues made the discovery by searching through astronomical images from the Victor M. Blanco Telescope and the Canada France Hawaii Telescope for bright spots that might represent a TNO.
—Margherita Bassi, Smithsonian Magazine, 29 May 2025
Negotiating strategy Trump’s approach to negotiations has involved threats of astronomical tariffs — up to 145% in the case of China — before striking a deal for far lower levels.
—David McHugh, Los Angeles Times, 28 May 2025
See All Example Sentences for astronomical
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Hannah Poukish, Sacbee.com, 8 June 2025
The summer solstice is an astronomical event marking the official start of summer in the Northern Hemisphere.
—Emese MacZko, Forbes.com, 6 June 2025
Cheng and his colleagues made the discovery by searching through astronomical images from the Victor M. Blanco Telescope and the Canada France Hawaii Telescope for bright spots that might represent a TNO.
—Margherita Bassi, Smithsonian Magazine, 29 May 2025
Negotiating strategy Trump’s approach to negotiations has involved threats of astronomical tariffs — up to 145% in the case of China — before striking a deal for far lower levels.
—David McHugh, Los Angeles Times, 28 May 2025
See All Example Sentences for astronomical
Cite this Entry
“Astronomical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astronomical. Accessed 17 Jun. 2025.
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
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