noun [ U ]
1.
a part of a river that looks white because the water is moving very fast over rocks :
a stretch of white water
white-water rafting
2.
a part of the sea or ocean that looks white because it is very rough and the waves are high
noun [ U ]
1.
a part of a river that looks white because the water is moving very fast over rocks :
a stretch of white water
white-water rafting
2.
a part of the sea or ocean that looks white because it is very rough and the waves are high
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005