Tidemark

What is Tidemark?

Tidemark definition and meaning on Dictionary terms:
noun
the point that something or someone has reached, receded below, or risen above: He has reached the tidemark of his prosperity.
a mark left by the highest or lowest point of a tide.
a mark made to indicate the highest or lowest point of a tide.

 

reference: https://www.dictionary.com/browse/tidemark

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