green·house
ˈgrēn-ˌhau̇s 
plural greenhouses
1
: a usually permanent climate-controlled structure enclosed (as by glass or multiple layers of plastic) and used usually year-round 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
: of, relating to, contributing to, or caused by the greenhouse effect
greenhouse warming
greenhouse gases
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
Nick Mordowanec, MSNBC Newsweek, 3 July 2025
The Tillery team uses heavy plastic sheets over steel carport frames to create temporary greenhouses to protect the nursery's succulents and cacti.
—Deborah Sengupta Stith, Austin American Statesman, 2 July 2025
Stephen Singer, Hartford Courant, 31 May 2022
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
See All Example Sentences for greenhouse
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Noun
In 2020, the U.S. Army's electricity usage alone generated 4.1 million tons of greenhouse gases—1 million tons greater than Switzerland's entire heat and electricity emissions in 2017.
—Nick Mordowanec, MSNBC Newsweek, 3 July 2025
The Tillery team uses heavy plastic sheets over steel carport frames to create temporary greenhouses to protect the nursery's succulents and cacti.
—Deborah Sengupta Stith, Austin American Statesman, 2 July 2025
Adjective
Millstone accounts for 40% of Connecticut’s electricity and 90% of non-greenhouse gas emissions.
—Stephen Singer, Hartford Courant, 31 May 2022
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
See All Example Sentences for greenhouse
Cite this Entry
“Greenhouse.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/greenhouse. Accessed 21 Jul. 2025.
Copy CitationKids Definition
greenhouse
1 of 2 noun
green·house
-ˌhau̇s
: a glassed enclosure for cultivation of plants
greenhouse
2 of 2 adjective
: relating to, causing, or caused by the greenhouse effect
greenhouse warming
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