green·​house | \ ˈgrēn-ˌhau̇s How to pronounce greenhouse (audio) \

Definition of greenhouse

 (Entry 1 of 2)

1 : a structure enclosed (as by glass) and used for the cultivation or protection of tender plants
2 : a clear plastic shell (such as a canopy) covering a section of an airplane also : a compartment (as for a bombardier) enclosed by such a shell



Definition of greenhouse (Entry 2 of 2)

: of, relating to, contributing to, or caused by the greenhouse effect greenhouse warming greenhouse gases

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Synonyms for greenhouse

Synonyms: Noun

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Examples of greenhouse in a Sentence

Noun needed to move the plants into the greenhouse before the first frost killed them
Recent Examples on the Web: Noun The oceans have long absorbed the vast majority - about 93% - of the extra heat humans are adding to the climate through greenhouse gas emissions. Anchorage Daily News, "2019, 2nd hottest year on record, capped world’s hottest recorded decade," 15 Jan. 2020 The competition authority fined Eni €5 million ($5.6 million) for allegedly claiming in an advertisement campaign its Diesel+ fuel significantly contributes to reducing greenhouse emissions. Giulia Petroni, WSJ, "Eni to Appeal Italian Fine For Diesel Ads," 15 Jan. 2020 Using data from emissions permits, facility capacities and emissions factors, the researchers projected the expected greenhouse emissions at each facility. Erin Douglas, Houston Chronicle, "Gulf Coast oil and gas expansion will generate half a billion annual tons of emissions in U.S.: report," 15 Jan. 2020 Buildings are responsible for 12% of U.S. greenhouse gas emissions. Josh Siegel, Washington Examiner, "Daily on Energy: Klobuchar faces backlash over natural gas," 15 Jan. 2020 That's how many pounds of greenhouse emissions JetBlue airlines produces every year. Alex Baker-whitcomb, Wired, "An Alarming Windows Bug, a Triumph for Tesla, and More News," 14 Jan. 2020 The study notes that curbing deforestation may have a substantial impact on future wildfires—enough to reduce potential greenhouse gas emissions by as much as 50%. Chelsea Harvey, Scientific American, "Wildfires Could Transform Amazon from Carbon Sink to Source," 14 Jan. 2020 Some runs were allowed to run on to 2080 with no changes, other than a midrange level of ongoing greenhouse gas emissions. John Timmer, Ars Technica, "Modeling what would happen to the UK if the Gulf Stream shuts down," 14 Jan. 2020 For Mars, and many businesses, this represents the lion's share of our global greenhouse gas emissions. Grant Reid For Cnn Business Perspectives, CNN, "Mars CEO: Business leaders must help fight the climate crisis," 13 Jan. 2020 Recent Examples on the Web: Adjective The surface is inhospitable due to the planet’s runaway greenhouse gas atmosphere and often reaches temperatures of up to 900 degrees Fahrenheit. Jennifer Leman, Popular Mechanics, "Looks Like Venus Was Volcanically Active All Along," 3 Jan. 2020 According to Ecopel, producing the material requires 30% less energy and produces 63% less greenhouse gas than conventional synthetic materials. Kristin Larson, Fortune, "Consumers Are Turning Away From Real Fur, but Faux Fur Is Not a Perfect Fashion Fix," 30 Dec. 2019 In 2015, forest fires in Indonesia alone pumped out more greenhouse gases per day than all sources in the U.S. Washington Post, "Can Palm Oil Demand Be Met Without Ruining Rainforests?," 16 Dec. 2019 Long commutes in single-occupancy vehicles means more greenhouse gas emissions. J.k. Dineen,, "Despite climate crisis, California continues to embrace exurban sprawl," 20 Sep. 2019 Reducing meat consumption can reduce not only greenhouse gas emissions, but also water scarcity. London Douglas, Houston Chronicle, "Here are some easy ways to reduce your carbon footprint, and help the environment," 13 Sep. 2019 Scientific forecasters use these political and economic pathways in climate models to inform their understanding of how greenhouse gas emissions and global temperatures will shift amid shifting new geopolitical alliances and confrontations. Emily Atkin, The New Republic, "The Blood-Dimmed Tide," 16 Sep. 2019 With coal, [an increase in demand] will mean more greenhouse gas emissions. Sarah Wu,, "Researchers say demand for energy for cooling will rise as world gets warmer," 31 July 2019 According to Unilever, asking consumers to dilute the product at home means 97 percent less water being transported, 87 percent fewer trucks on the road, and less greenhouse gas emissions. Alden Wicker, Vox, "Could just-add-water products save us?," 30 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'greenhouse.' 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 greenhouse


1664, in the meaning defined at sense 1


1974, in the meaning defined above

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Time Traveler for greenhouse

Time Traveler

The first known use of greenhouse was in 1664

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Statistics for greenhouse

Last Updated

18 Jan 2020

Cite this Entry

“Greenhouse.” The Dictionary, Merriam-Webster Inc., Accessed 19 January 2020.

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More Definitions for greenhouse


How to pronounce greenhouse (audio)

English Language Learners Definition of greenhouse

 (Entry 1 of 2)

: a building or part of a building that has glass walls and a glass roof and that is used for growing plants



English Language Learners Definition of greenhouse (Entry 2 of 2)

: relating to or caused by the warming of the Earth's atmosphere that is caused by air pollution : relating to or caused by the greenhouse effect


green·​house | \ ˈgrēn-ˌhau̇s How to pronounce greenhouse (audio) \

Kids Definition of greenhouse

: a building with clear walls and roof (as of glass) for growing plants

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Comments on greenhouse

What made you want to look up greenhouse? Please tell us where you read or heard it (including the quote, if possible).


to insert between existing elements

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