I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English, from water + fall
1.
a. : a perpendicular or very steep descent of the water of a stream : cascade , cataract , fall
b. obsolete : a riffle or rapid in a swift stream
2. : a falling away of the ground such as to cause drainage of water
3. : something felt to resemble a waterfall: as
a. : a cascade of cloth
b. : a fall of waved hair
II. adjective
: arranged like a waterfall
a waterfall arrangement of the drums of a 3-drum hoist in which the axis of the center drum is higher than that of one end drum and lower than that of the other end drum
especially : curving smoothly from horizontal to perpendicular
a waterfall edge on a chair seat