waterfall[
'wɒtәfɒ:l]
n. 瀑布
waterfall[ noun ]a steep descent of the water of a river<noun.object> 
Waterfall \Wa"ter*fall`\, n.
1. A fall, or perpendicular descent, of the water of a river
or stream, or a descent nearly perpendicular; a cascade; a
cataract.
2. (Hairdressing) An arrangement of a woman's back hair over
a cushion or frame in some resemblance to a waterfall.
3. A certain kind of neck scarf. --T. Hughes.