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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The surprising January heat record coincides with a new study by a climate science heavyweight, former top NASA scientist James Hansen, and others arguing that global warming is accelerating. Seth Borenstein, Chicago Tribune, 6 Feb. 2025 In a report this week, James Hansen, the famed former NASA scientist, argued that cutting pollution had already played a big role in causing global warming to accelerate. Raymond Zhong, New York Times, 6 Feb. 2025 The move to powering its facilities by renewable energy represents Boise moving forward on policies to fight climate change, or global warming, at a time when the Idaho Legislature is actively pushing back against environmental and climate programs. Clark Corbin, Idaho Statesman, 3 Feb. 2025 Repeating a policy from his first term, Trump started the yearlong process to withdraw from the Paris Agreement, in which countries agreed to limit climate pollution and avoid the worst effects of global warming. Jeff Brady, NPR, 1 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

Dictionary Entries Near global warming

Cite this Entry

“Global warming.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/global%20warming. Accessed 16 Feb. 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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