as·​tro·​nom·​i·​cal | \ˌas-trə-ˈnä-mi-kəl \
variants: or less commonly astronomic \ -​mik \

Definition of astronomical 

1 : of or relating to astronomy astronomical observations

2 : enormously or inconceivably large or great astronomical numbers an astronomical price

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Other Words from astronomical

astronomically \ -​mi-​k(ə-​)lē \ adverb

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

In a modern age where transfer fees have ballooned to astronomical figures which make parting with £20m seem like loose change, Liverpool should not be batting an eyelid at dishing out £12m for Stoke's Xherdan Shaqiri., "Why Xherdan Shaqiri Is the Affordable Attacking Option Liverpool Should Pursue This Summer," 7 June 2018 Peterson and his defense attorney, David Rudolf, spend a disproportionate amount of time laughing at Peterson’s absurd predicament and Rudolf’s astronomical bills. Sophie Gilbert, The Atlantic, "The Queasy Verdict of The Staircase," 26 June 2018 Instead of cranking up your air conditioner and finding yourself with an astronomical electric bill, here’s another solution: Get a pair of breathable but still very pretty pajamas. Indya Brown, The Cut, "14 Delightful Pajamas for Hot Summer Nights," 24 May 2018 Real Madrid are still planning to spend big this summer, despite needing a loan to cover their astronomical wage bill in January, according to reports., "Real Madrid Still Planning to Spend Big This Summer Despite Needing Bailout for Astronomical Wages," 4 May 2018 Horror stories of treatments denied and astronomical bills charged are legion. Michael Hiltzik,, "California confronts the complexities of creating a single-payer healthcare system," 9 Feb. 2018 While the storm has been pushed out to sea, powerful astronomical high tides are expected early Sunday along the New England coast, including Nantucket, the National Weather Service tweeted. CBS News, "Nor'easter high tides, gusty winds still pounding New England coast," 4 Mar. 2018 Be sure to visit Friends of the Cosmic Campground for a calendar of classes, star parties, and astronomical events. Megan Michelson, Outside Online, "These Are the Best Stargazing Spots in North America," 13 July 2018 Within seconds IceCube had alerted an armada of astronomical satellites, including the Fermi Gamma-ray Space Telescope. Dennis Overbye, New York Times, "It Came From a Black Hole, and Landed in Antarctica," 12 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'astronomical.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of astronomical

1551, in the meaning defined at sense 1

History and Etymology for astronomical

see astronomy

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Last Updated

10 Nov 2018

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The first known use of astronomical was in 1551

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English Language Learners Definition of astronomical

: of or relating to astronomy

: extremely large


as·​tro·​nom·​i·​cal | \ˌa-strə-ˈnä-mi-kəl \
variants: or astronomic \ -​ik \

Kids Definition of astronomical

1 : of or relating to astronomy astronomical research

2 : extremely or unbelievably large The cost was astronomical.

Other Words from astronomical

astronomically adverb an astronomically large amount

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