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
- Brobdingnagian
- bumper
- colossal
- cosmic
- cosmical
- cyclopean
- elephantine
- enormous
- galactic
- gargantuan
- giant
- gigantesque
- gigantic
- grand
- herculean
- heroic
- heroical
- Himalayan
- huge
- humongous
- humungous
- immense
- jumbo
- king-size
- king-sized
- leviathan
- mammoth
- massive
- mega
- mighty
- monster
- monstrous
- monumental
- mountainous
- oceanic
- pharaonic
- planetary
- prodigious
- super
- super-duper
- supersize
- supersized
- titanic
- tremendous
- vast
- vasty
- walloping
- whacking
- whopping
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
Meanwhile, Borealis will sail through Spain and Portugal, blending Iberian culture with this astronomical spectacle.
—
Daisy Dobrijevic, Space.com, 8 Feb. 2025
The notification is meant to put the astronomical community on alert to collect as much information as possible on the near-Earth object (NEO) in question.
—Scott Neuman, NPR, 2 Feb. 2025
Those impatient for an astronomical treat might also like to turn their eyes to the skies tonight (January 31) if based in northern Maine and Michigan, where aurora may be visible thanks to a massive hole that has developed in the sun's upper atmosphere.
—Dan Perry, Newsweek, 31 Jan. 2025
How much an investment in Apple is worth While the stock has performed well over the past year, its long-term gains have been astronomical.
—Mike Winters, CNBC, 30 Jan. 2025
See all Example Sentences for astronomical 
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Daisy Dobrijevic, Space.com, 8 Feb. 2025
The notification is meant to put the astronomical community on alert to collect as much information as possible on the near-Earth object (NEO) in question.
—Scott Neuman, NPR, 2 Feb. 2025
Those impatient for an astronomical treat might also like to turn their eyes to the skies tonight (January 31) if based in northern Maine and Michigan, where aurora may be visible thanks to a massive hole that has developed in the sun's upper atmosphere.
—Dan Perry, Newsweek, 31 Jan. 2025
How much an investment in Apple is worth While the stock has performed well over the past year, its long-term gains have been astronomical.
—Mike Winters, CNBC, 30 Jan. 2025
See all Example Sentences for astronomical
Articles Related to astronomical
Dictionary Entries Near astronomical
Cite this Entry
“Astronomical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astronomical. Accessed 20 Feb. 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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