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
For specific neighborhoods, the year-over-year increase in nightly demand for rentals was astronomical.
—
Irene Wright, USA Today, 12 Dec. 2025
The observations were made using the Atacama Large Millimeter/submillimeter Array (ALMA), a collection of 66 radio antennas in northern Chile that come together to comprise the largest astronomical project in existence.
—Robert Lea, Space.com, 11 Dec. 2025
At the San Jacinto Waste Pits, for example, the protective concrete cap was smashed by 16 feet of flood waters, sending astronomical amounts of dioxins into the river.
—Cynthia Palmer, Time, 9 Dec. 2025
Regardless of the astronomical price a bottle may fetch or the attention lavished upon it by doting admirers, wine is, at its essence, an agricultural product, one whose economic value in the United States is $323 billion.
—Mike Desimone, Robb Report, 7 Dec. 2025
See All Example Sentences for astronomical
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Irene Wright, USA Today, 12 Dec. 2025
The observations were made using the Atacama Large Millimeter/submillimeter Array (ALMA), a collection of 66 radio antennas in northern Chile that come together to comprise the largest astronomical project in existence.
—Robert Lea, Space.com, 11 Dec. 2025
At the San Jacinto Waste Pits, for example, the protective concrete cap was smashed by 16 feet of flood waters, sending astronomical amounts of dioxins into the river.
—Cynthia Palmer, Time, 9 Dec. 2025
Regardless of the astronomical price a bottle may fetch or the attention lavished upon it by doting admirers, wine is, at its essence, an agricultural product, one whose economic value in the United States is $323 billion.
—Mike Desimone, Robb Report, 7 Dec. 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 16 Dec. 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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