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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Dismissing hundreds of researchers studying the impact of global warming. · Driving scientists to look for work in other countries. Steve Lopez, Mercury News, 7 May 2025 Dismissing the precedent would strip the EPA’s authority to manage the pollution that causes global warming. Annie Grayer, CNN Money, 6 May 2025 So the laws allow states to seek money from fossil fuel producers to help cover the costs of global warming. Karen Zraick, New York Times, 2 May 2025 And Trump’s moves have drawn criticism from environmental groups, who note that burning coal is the most polluting of all fossil fuels and accounts for roughly 40 percent of the world’s industrial carbon dioxide emissions, the main driver of global warming. Chris Kenning, USA Today, 1 May 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 17 May. 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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