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rainforest

noun

rain·​for·​est ˈrān-ˌfȯr-əst How to pronounce rainforest (audio)
-ˌfär-
variants or less commonly rain forest
plural rainforests also rain forests
1
: a tropical woodland with an annual rainfall of at least 100 inches (254 centimeters) and marked by lofty broad-leaved evergreen trees forming a continuous canopy

called also tropical rainforest

2

Examples of rainforest in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The Pacific Side of Costa Rica Here, the rainforest meets the sea in a dramatic fashion. Geoffrey Ravoire, Travel + Leisure, 29 Nov. 2025 On the fossil fuel front, its phase-out roadmap continued to grow in the heart of the Amazon rainforest, with more than 80 countries—across Africa, Asia, Latin America, the Pacific and Europe—already onboard, according to the Global Gas & Oil Network (GGON). Alexandra Harrell, Sourcing Journal, 26 Nov. 2025 But much effort was also funneled into ushering The Wilder Townhouse into the 21st century, too (just look to the rainforest showers for proof). Liam Hess, Vogue, 26 Nov. 2025 The interconnected climate systems of the Greenland ice sheet, the Atlantic meridional overturning circulation, the Amazon rainforest, and the South American monsoon are destabilizing. Rafil Kroll-Zaidi, Harpers Magazine, 23 Nov. 2025 The film explores a strange colonial scheme in the 20th century when automaker Henry Ford attempted to create a rubber plantation in the Amazon rainforest of Brazil. Matthew Carey, Deadline, 16 Nov. 2025 Recent expansions of botanical knowledge regarding the cumaru tree underscore the rainforest giant as both symbolically and physically stable. JSTOR Daily, 15 Nov. 2025 Efforts to slow deforestation – including in the mighty carbon sink that is the Amazon rainforest – have helped, but most countries will have to make major adjustments to their energy production and consumption practices over the coming years. Abhimanyu Ghoshal, New Atlas, 14 Nov. 2025 Sophie met the sizable spider during her visit to the Amazon rainforest, making the stop to meet Indigenous leaders, including women who are fueling their communities through environmental and economic activities. Janine Henni, PEOPLE, 13 Nov. 2025

Word History

First Known Use

1900, in the meaning defined at sense 1

Time Traveler
The first known use of rainforest was in 1900

Browse Nearby Words

Cite this Entry

“Rainforest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainforest. Accessed 3 Dec. 2025.

Kids Definition

rain forest

noun
1
: an often tropical woodland with a high annual rainfall and very tall evergreen trees with tops forming a continuous layer

called also tropical rain forest

2

More from Merriam-Webster on rainforest

Last Updated: - Updated example sentences
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