global warming

noun

: an increase in the earth's atmospheric and oceanic temperatures widely predicted to occur due to an increase in the greenhouse effect resulting especially from pollution
A Russian-owned tanker, built to traverse the frozen waters of the Arctic, completed a journey in record time from Europe to Asia this month, auguring the future of shipping as global warming melts sea ice.Russell Goldman
Debates about stem cells, global warming, and alternative energy might be less contentious if the scientific issues behind them were better understood.Elizabeth Gettelman
The development is also meant to boost tourism in Zermatt, which, like many Alpine towns worried about the effects of global warming on winter tourism, is exploring ways to draw visitors throughout the year.Jim Rendon
… I think it makes a compelling case, at least for most audiences, that humans are the cause of most of the global warming that is taking place, and that unless we take quick action the consequences for our planetary home could become irreversible.Al Gore

Examples of global warming in a Sentence

Recent Examples on the Web
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Climate scientists are still studying the record warmth of the past two-plus years, with some buying into the possibility that global warming may have accelerated, at least in the short term. Andrew Freedman, Axios, 6 Mar. 2025 With recent natural disasters devastating communities, many have stopped questioning whether global warming is or isn’t real and are looking for sustainable products that can not only help save the environment but also provide cheaper and cleaner options. Seth Lederman, Forbes, 4 Mar. 2025 The demand for better drainage solutions has been growing, with global warming causing unpredicted heavy rainfall. Tyler Shepherd, USA TODAY, 4 Mar. 2025 Here’s the thing: Large majorities of Americans understand that global warming is real, dangerous and caused by humans. Sammy Roth, Los Angeles Times, 25 Feb. 2025 See All Example Sentences for global warming

Word History

First Known Use

1953, in the meaning defined above

Time Traveler
The first known use of global warming was in 1953

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Cite this Entry

“Global warming.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/global%20warming. Accessed 12 Mar. 2025.

Kids Definition

global warming

noun
: a warming of the earth's atmosphere and oceans that is widely predicted to result from an increase in the greenhouse effect caused by air pollution

More from Merriam-Webster on global warming

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