When I look up any definition in the dictionary I have never found the word I was trying to understand as part as the definition as is the case with the wdfw's definition of the mouth.

I have read the definition forwards and backwards and have come the the conclusion it can be interpreted many different ways and is confusing at best.

The way I understand the definition, I take it as drawing a line at the high tide mark. After all, rivers are not saltwater.

How do you all interpret the definition?