as·​tro·​nom·​i·​cal | \ ˌas-trə-ˈnä-mi-kəl How to pronounce astronomical (audio) \
variants: or less commonly astronomic \ -​mik How to pronounce astronomic (audio) \

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 How to pronounce astronomically (audio) \ 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

And satellite internet service promises to grow at an equally astronomical rate. William Harwood, CBS News, "SpaceX rocket launches powerful communications satellite," 4 June 2018 Tech stocks are often coming to market amid talk of astronomical valuations, based on previous private funding rounds. Andrew Peaple, WSJ, "An Ugly Victory for Hong Kong in the IPO Derby," 31 Dec. 2018 And so begins the start of the astronomical winter season, which lasts until the spring equinox on March 20. Kelly O'sullivan, Country Living, "Winter Solstice 2018: Who Celebrates the First Day of Winter?," 20 Dec. 2018 Having to do even more paperwork to go to space could decrease efficiency, and a fine of nearly $1 million isn’t a small amount, even for companies used to dealing with astronomical sums of money. Loren Grush, The Verge, "FCC slams spaceflight company with $900,000 fine over illegal satellite launch," 20 Dec. 2018 Astronomer: Observing, researching and interpreting astronomical phenomena requires a strong understanding of mathematics., "Jobs add up for students proficient in math," 19 Apr. 2018 In 2010, the military relocated our family from Illinois to San Diego, where the cost of living seemed astronomical. Sandy M. Fernandez, Woman's Day, "How Three Women Are Pioneering to End Hunger in the U.S.," 14 Nov. 2018 While the difficulties of building such an elevator are astronomical, the potential for financial benefits are equally large. David Grossman, Popular Mechanics, "Space Elevators Getting First Test in Space," 4 Sep. 2018 When a rural carrier's customer regularly travels outside the rural area, the cost to support that rural customer accessing T-Mobile's network through a roaming agreement can be astronomical. Jon Brodkin, Ars Technica, "T-Mobile/Sprint merger will bring higher prices, small carriers tell FCC," 30 Aug. 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

17 Feb 2019

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Time Traveler for astronomical

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 How to pronounce astronomical (audio) \
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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Comments on astronomical

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