greenhouse

noun

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

Synonyms of greenhouse

• conservatory

Examples of greenhouse in a Sentence

needed to move the plants into the greenhouse before the first frost killed them

Recent Examples on the Web

Staff work out of greenhouses, laboratories and cabins in urban areas like Baltimore and in more rural offices near the 193 million acres of national forest and grassland that the agency manages. —Chiara Eisner, NPR, 6 June 2026

Designed by landscape architects Chauncey Beadle and Lola Anderson Dennis, the grounds also include rolling lawns, mature trees, a greenhouse, outbuildings and mountain views. —Joe Marusak, Charlotte Observer, 6 June 2026

Two years ago, an Indian man was left to die after his right arm was severed from heavy machinery at a melon greenhouse. —Matteo Moschella, NBC news, 4 June 2026

If your bathroom feels like a greenhouse afterward, your plants may love it and, unfortunately, so will mold and mildew. —Karen Brewer Grossman, Southern Living, 3 June 2026

Word History

First Known Use

1664, in the meaning defined at sense 1

Phrases Containing greenhouse

• greenhouse effect
• greenhouse gas
• the greenhouse effect

Rhymes for greenhouse

• alehouse
• almshouse
• backhouse
• baghouse
• bakehouse
• bathhouse
• bauhaus
• blockhouse
• boathouse
• brewhouse
• bunkhouse
• clubhouse

Kids 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