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

Keep scrolling for more

Synonyms for greenhouse

Synonyms: Noun

Visit the Thesaurus for More 

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 Not included in the NGSA's announcement were other greenhouse gas emissions such methane, which oil companies routinely flare in lieu of building pipelines and other infrastructure to get natural gas to market. James Osborne, Houston Chronicle, "Natural gas companies call for carbon tax," 3 Dec. 2019 Mar-a-Lago, valued at $2 million at the time, employed among the maintenance staff 22 year-round gardeners tasked with, among other things, moving 10,000 potted plants indoors to greenhouses when Mrs. Post was not in residence. Les Standiford, Town & Country, "How Mar-a-Lago Almost Became the Kennedy and Johnson Winter White House," 1 Dec. 2019 In the last decade, global greenhouse gas emissions have risen by about 1.5 percent each year on average. Jennifer Leman, Popular Mechanics, "Welp, the Latest UN Climate Change Report Sure Is Bleak," 26 Nov. 2019 In Massachusetts, residential buildings account for roughly 15% of the state’s greenhouse gas emissions. Benjamin Storrow, Scientific American, "Cities Look to Natural Gas Bans to Curb Carbon Emissions," 25 Nov. 2019 The house stood on 4.5 acres that included a compound of greenhouses, a 5-story windmill, and terraced front lawn that led down to simpler homes on Main Street. Mary Ann Ashcraft,, "Carroll Yesteryears: Norwood Mansion and Terrace Hill: Two architectural treasures in Carroll County," 23 Nov. 2019 By the end of the year, Gotham will operate 500,000 square feet of greenhouses across five states. Laura Reiley, Washington Post, "Indoor farming is one of the decade’s hottest trends, but regulations make success elusive," 19 Nov. 2019 Helping to care for the greenhouse at Seabury kept Prue connected to her love of nature and the great outdoors., "Prudence J. Griffen," 24 Oct. 2019 The luxuriant plants inside Biosphere 2, a 30-year-old set of greenhouses and artificial ecosystems in the Arizona desert, soaked up the isotopic tracer, enabling investigators to follow the flows of carbon through the healthy forest. Erik Stokstad, Science | AAAS, "Unprecedented drought in an artificial ecosystem may reveal how rainforests will cope with climate change," 16 Oct. 2019 Recent Examples on the Web: Adjective 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 Producers therefore emit more greenhouse gas per barrel (see chart). The Economist, "The environmentThe environment is Canada’s biggest wedge issue," 25 July 2019 New York City recently mandated that the owners of its largest buildings slash their emissions impact, and new legislation requires New York State to eliminate nearly all greenhouse gas output by 2050. Anne Barnard, New York Times, "A ‘Climate Emergency’ Was Declared in New York City. Will That Change Anything?," 5 July 2019 Most research says growing vegetables uses less water and produces far less greenhouse gas than raising cattle. The Christian Science Monitor, "A global moment for the #MeToo movement," 19 June 2019 Most research says growing vegetables uses less water and produces far less greenhouse gas than raising cattle. The Christian Science Monitor, "A global moment for the #MeToo movement," 19 June 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.

See More

First Known Use of greenhouse


1664, in the meaning defined at sense 1


1974, in the meaning defined above

Keep scrolling for more

Learn More about greenhouse

Time Traveler for greenhouse

Time Traveler

The first known use of greenhouse was in 1664

See more words from the same year

Statistics for greenhouse

Last Updated

6 Dec 2019

Cite this Entry

“Greenhouse.” The Dictionary, Merriam-Webster Inc., Accessed 14 December 2019.

Keep scrolling for more

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

Keep scrolling for more

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 assail by words or arguments

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!