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.
Sloths primarily live in rainforests and are known as biological introverts for their highly specialized diets and survival mechanisms adapted over millions of years of evolution. Cristóbal Reyes, The Orlando Sentinel, 13 May 2026 Large portions of the rainforest remain effectively ungoverned. Antonio María Delgado, Miami Herald, 13 May 2026 Continue to Totem Bight State Historical Park, where totems rise from a rainforest overlooking the Tongass Narrows. Josh Rivera, USA Today, 13 May 2026 Even some of the world’s largest and most biodiverse rainforests may not be escaping the reach of microplastic pollution. Ryan Brennan, Sacbee.com, 12 May 2026 Icons like the Amazon rainforest, Great Barrier Reef, and Victoria Falls tend to top the list, but sometimes a site’s notoriety can be its downfall, especially when high visitation leads to crowding and environmental degradation. Evie Carrick, Travel + Leisure, 12 May 2026 Deep in Mesoamerica’s largest rainforest stands a bare concrete house with a sweeping view and dark history. Anna Lello-Smith, New York Daily News, 9 May 2026 From a structured health retreat in the Australian rainforest to a discreet TriBeCa hideaway, A-listers have moved into hospitality in a meaningful way, building (and buying) properties that reflect their own travel preferences and lifestyles. Hanna Wickes, Fort Worth Star-Telegram, 7 May 2026 For privacy and space, the Datai Estate Villa or rainforest pool villas are ideal choices for families. Condé Nast, Condé Nast Traveler, 6 May 2026

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 16 May. 2026.

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

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