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.
Her travel writing has taken her to rainforests, remote tropical islands, and the red carpets of Cannes. Felicity Carter, Forbes.com, 3 May 2025 This narrow ribbon of asphalt unfolds along Maui’s untamed eastern coastline, cutting through thick, green rainforest. Evie Carrick, Travel + Leisure, 2 May 2025 The impersonal hand of the machine is programmed to render nature drawings by Imazu, the rainforest scene’s erasure directly tied to the health of the plant that serves as its living stand-in. Naima Morelli, Artforum, 1 May 2025 Like the Amazon rainforest, kelp and other seaweed can aid in carbon absorption. Avery Schuyler Nunn, Smithsonian Magazine, 30 Apr. 2025 There is some good news The study also found that carbon released by certain tipping points (such as Amazon rainforest dieback and permafrost thaw) is unlikely to cause enough warming to trigger other tipping points. Doyle Rice, USA Today, 24 Apr. 2025 The lizards are around 21 inches long and feast on leaves, fruits and flowers in the coastal swamps and rainforests of their native islands. Clara Harter, Los Angeles Times, 24 Apr. 2025 Don’t Miss: Hiking through lush rainforest on the park’s 20 miles of trails. Jenna Blough, Outside Online, 8 Apr. 2025 There, William and Kate will join a group of local schoolchildren for some outdoor learning at the ancient Atlantic rainforest. Simon Perry, People.com, 22 Apr. 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

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Cite this Entry

“Rainforest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainforest. Accessed 9 May. 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

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