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 Here’s a useful primer on nitrous oxide (N2O, or laughing gas), which is the third most common greenhouse gas, after carbon dioxide and methane. Bill Mckibben, The New Yorker, 2 June 2021 Administration officials say the president remains committed to an agenda aimed at curbing greenhouse gas emissions and arresting climate change. Timothy Puko, WSJ, 1 June 2021 Carbon emissions, technically known as greenhouse gas emissions (GHG), might constitute the relatively low hanging fruit for regulators to pluck in this area. Shivaram Rajgopal, Forbes, 1 June 2021 But Wednesday’s first-of-a-kind ruling demands a change in Shell’s strategy for the future, setting a precedent not just for energy companies but all big greenhouse gas emitters. Andrew Stuttaford, National Review, 31 May 2021 In 2019, the Supreme Court of the Netherlands ordered the government to cut greenhouse gas emissions because of a lawsuit filed by Urgenda, an environmental group. New York Times, 29 May 2021 Livestock, including cattle, account for about 2.5 percent of U.S. greenhouse gas emissions, according to the EPA. NBC News, 28 May 2021 The Hague District Court ruled that the Anglo-Dutch energy giant has a duty to care about reducing greenhouse-gas emissions and that its current reduction plans were not concrete enough. Arkansas Online, 27 May 2021 Addressing global scale reductions in greenhouse gas emissions requires huge shifts away from fossil fuel use towards zero carbon energy sources, and each country needs policies to incentivize this transition. Birnur Aral, Ph.d., Good Housekeeping, 27 May 2021 Recent Examples on the Web: Adjective And there are other ways for the president to crack down on emissions, including tightening regulations on non-greenhouse coal-plant pollutants and vehicle fuel economy standards, and boosting support for renewables. Tim Mcdonnell, Quartz, 22 Sep. 2020 The emissions impact of millions of people not commuting by car every day are enormous No single activity contributes more greenhouse gas emissions than driving to and from work. Matt Butner, Quartz at Work, 5 May 2020 Ideally, the new project would generate less greenhouse gas emissions than are being created at the Coliseum. Phil Matier,, 25 Mar. 2020 The change is also expected to result in significantly more greenhouse gas emissions, which trap the sun’s heat, worsening the effects of climate change. Los Angeles Times, 31 Mar. 2020 Of the 90 countries whose oil extraction was studied, few generated more greenhouse gas per barrel. Christopher Flavelle, New York Times, 12 Feb. 2020 The thawing of permafrost represents a positive feedback that amplifies warming by releasing more greenhouse gas into the atmosphere. Scott K. Johnson, Ars Technica, 6 Feb. 2020 Increasing fuel efficiency means vehicles burn less gas and subsequently emit less greenhouse gas pollution into the atmosphere. New York Times, 25 July 2019 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, 3 Jan. 2020

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

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The first known use of greenhouse was in 1664

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Statistics for greenhouse

Last Updated

5 Jun 2021

Cite this Entry

“Greenhouse.” Dictionary, Merriam-Webster, Accessed 12 Jun. 2021.

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More Definitions for greenhouse



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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