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 In the highlands of the southern Amazon rainforest, the heavy rainfall creates the headwaters of a vast river system, connecting the deepest reaches of the forest through water. Irene Wright, Miami Herald, 22 May 2024 Imagine that you’re sent to a pristine rainforest to carry out a wildlife census. Steve Nadis, Quanta Magazine, 16 May 2024 In the nearly three decades since, the 39-year-old geologist has trekked into dozens of caves around the world: on islands in the Atlantic Ocean, inside glacier mills in the Alps, beneath the forest floor of the Amazon rainforest. Yudhijit Bhattacharjee, Smithsonian Magazine, 16 May 2024 Step off London’s bustling Berkeley Street and into a reception entrance where you are immediately shielded under a living, breathing chandelier — or rather, a sprawling dome canopy of rainforest moss. Stacey Wreathall and Dafydd Gwyon, Travel + Leisure, 15 May 2024 Much of the Amazon rainforest is in danger of becoming a savannah, for example. Justine Calma, The Verge, 14 May 2024 About a fifth of the great rainforest is already gone. Manuela Andreoni Victor Moriyama, New York Times, 2 May 2024 The children survived for 40 days in the deep Amazonian rainforest using their Indigenous knowledge of the jungle and the daring national effort to rescue them. Addie Morfoot, Variety, 9 May 2024 Other entities estimate that up to 179,000 jaguars roam the mountains, rainforests and grasslands in the Americas. Debra Utacia Krol, The Arizona Republic, 9 May 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'rainforest.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1900, in the meaning defined at sense 1

Time Traveler
The first known use of rainforest was in 1900

Dictionary Entries Near rainforest

Cite this Entry

“Rainforest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rainforest. Accessed 28 May. 2024.

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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!