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Synonyms

greenhouse

American  
[green-hous] / ˈgrinˌhaʊs /

noun

plural

greenhouses

  1. a building, room, or area, usually chiefly of glass, in which the temperature is maintained within a desired range, used for cultivating tender plants or growing plants out of season.

greenhouse British  
/ ˈɡriːnˌhaʊs /

noun

  1. a building with transparent walls and roof, usually of glass, for the cultivation and exhibition of plants under controlled conditions

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of greenhouse

First recorded in 1655–65; green + house

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s also important when planning any new dam, Harrison said, to analyze how much greenhouse gases it will release into the atmosphere over its lifespan.

From Los Angeles Times • Apr. 15, 2026

That adds methane, a potent greenhouse gas, into the atmosphere.

From The Wall Street Journal • Apr. 9, 2026

The primary component of natural gas is methane, which, when burned, releases CO2 -- the leading greenhouse gas responsible for global warming.

From Barron's • Mar. 27, 2026

The climate change plan was drawn up after the Scottish government replaced its annual targets for reducing planet warming greenhouse gas emissions with five-yearly carbon budgets.

From BBC • Mar. 24, 2026

Roza’s took place in the biology department’s greenhouse with a gray-faced professor visiting from central Illinois.

From "Bone Gap" by Laura Ruby

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.