a vertical drop in a stream or river; sometimes a reference to the broken water of a rapid or shoal: Bridal Veil Falls, Rutledge Falls, Foster Falls.

a major drop where the river plunges steeply over rocks or broken riverbed

a steep descent of the water of a river

A sudden, more or less perpendicular, descent of water over a natural step in the bed of a river or stream.

A sudden drop over an edge where water falls free into a pool below. Falls should be attempted by advanced kayakers only.

A drop over which the water falls free at least part of the way.

perpendicular or very steep fall of water in the course of a stream (cascade, cataract, waterfall).