Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A dense evergreen forest with an annual rainfall of at least 406 centimeters (160 inches). Rainforests are often, but not always, located in tropical regions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a forest in a climate with high annual rainfall and no dry season

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a forest with heavy annual rainfall

Etymologies

rain +‎ forest, a calque of German Regenwald. (Wiktionary)

Examples

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