Definitions
1.nounA flow of water over the edge of a cliff.
2.nounA waterfall-like outpouring of liquid, smoke, etc."A waterfall of mist came from the open freezer."
3.nounWaterfall model
4.nounThe action of drinking from a vessel without touching it with the lips, considered more sanitary for a shared vessel."Hey man, can I take a waterfall from your bottle?"
5.nounA necktie.
6.nounA chignon.
7.nounA beard."I found home a dreary place after my long absence; for half the children I had known were now wearing whiskers or waterfalls... (Mark Twain, Roughing It)"
8.verbTo fall like a waterfall.
9.verbTo drink (something) from a container by pouring it from a height so as not to touch one's lips to the rim.