high-water mark

Definition of High-water Mark in English :

1. high-water mark

a line marking the highest level reached

WordNet Lexical Database for English. Princeton University. 2010.

High-water Mark

noun

1.

a.

the level reached by sea water at high tide or by other stretches of water in flood

b.

the mark indicating this level

2.

the highest point

1.

the highest level reached by a body of water in tidal flow, flood, etc.

2.

the mark left after high water has receded

3.

a culminating point; highest point

n.

1. A mark indicating the highest level a body of water reaches.

2. The highest point, as of achievement; the apex.