- a tropical forest, usually of tall, densely growing, broad-leaved evergreen trees in an area of high annual rainfall.
Origin of rain forest
First recorded in 1900–05
Also called tropical rain forest.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for rain forest
1899, apparently a loan-translation of German Regenwald, coined by A.F.W. Schimper for his 1898 work "Pflanzengeographie."
Online Etymology Dictionary, © 2010 Douglas Harper