greenhouse

American  

[green-hous] / ˈgrinˌhaʊs /

noun

greenhouses plural

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.

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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

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Other Word Forms

Noun Inflected Forms

• greenhouses
  plural

Etymology

Origin of greenhouse

First recorded in 1655–65; green + house

Example Sentences

Greenhouse gas emissions are the main driver of climate change, which has made heatwaves more frequent and intense.

From Barron's • Jun. 26, 2026

The Greenhouse Gas Protocol is still conducting its review.

From The Wall Street Journal • Feb. 18, 2026

Greenhouse gas levels in the US peaked in the late 2000s and have been on a steady decline in the years since.

From BBC • Feb. 13, 2026

The program initially had about $13 million at its disposal: $10 million worth of general funds and an additional $3 million from the state’s Greenhouse Gas Reduction Fund, according to CARB.

From Los Angeles Times • Feb. 6, 2026

Greenhouse was a turning point in the American H-bomb program.

From "Big Science" by Michael Hiltzik

Related Words

• arboretum
• conservatory
• nursery