1A turbulent stretch of open water caused by a strong current or tide over a submarine ridge, or by a meeting of currents.
湍流；逆流碎波
Example sentencesExamples
You need very calm surface conditions and a northward current in Jack Sound, but not so strong as to cause turbulent overfalls.
Divers should be aware that the whole area is subject to complex and strong tidal streams and heavy overfalls.
This current is often too strong to swim against, but it's never strong enough to form overfalls on this part of the reef.
1.1A place where surplus water overflows from a dam, weir, or pool.
漫水坝，溢流坝；溢洪道
Definition of overfall in US English:
overfall
nounˈōvərˌfôlˈoʊvərˌfɔl
1A turbulent stretch of open water caused by the wind blowing against a current, by a strong current or tide over an underwater ridge, or by a meeting of currents.
湍流；逆流碎波
Example sentencesExamples
You need very calm surface conditions and a northward current in Jack Sound, but not so strong as to cause turbulent overfalls.
This current is often too strong to swim against, but it's never strong enough to form overfalls on this part of the reef.
Divers should be aware that the whole area is subject to complex and strong tidal streams and heavy overfalls.
1.1A place where surplus water overflows from a dam, pond, etc.