noun
1. : a tropical woodland that has an annual rainfall of at least 100 inches and often much more, is typical of but not wholly restricted to certain lowland areas, is characterized by lofty broad-leaved evergreen trees forming a continuous canopy, lianas, and herbaceous and woody epiphytes and by nearly complete absence of low-growing or understory ground-rooted plants — called also tropical rain forest
2. : temperate rain forest