# rainforest

/ˈɹaɪnˌfɔɹəst/ (US) · /ɹˈeɪnfˌɒɹɪst/ (UK) · CEFR B1 · Noun

Source: https://englishreference.com/word/rainforest
Updated: 2026-05-06

## Definition

a thick forest in a tropical area that gets a lot of rain. These forests are home to many different kinds of plants and animals.

For teachers: a dense forest, typically found in tropical areas, characterized by high rainfall and a diverse ecosystem. Often used to describe regions with a closed canopy and high biodiversity.

## Examples

- The Amazon is the largest rainforest in the world.
- Many rare species of birds live deep within the tropical rainforest where the trees are tallest.
- Conservationists argue that protecting the rainforest is essential for maintaining global climate stability and preserving genetic diversity that could lead to future medical breakthroughs.

## Usage notes

- Usually countable when referring to a specific geographic area; uncountable when discussing the habitat type in general.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.