Tidemark

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tidemark \Tide"mark\, n.
     1. a mark on a shore line indicating the normal level of the
        water at high tide, caused by the action of the flowing
        water; sometimes also used for the mark left at the point
        of the normal low tide; -- called also {high water mark}.
        [PJC]


  
     2. [fig.] the maximum level which some activity has reached
        and from which it has declined; -- called also {high water
        mark}.
        [PJC]

From WordNet (r) 2.0 [wn]:

  tidemark
       n : indicator consisting of a line at the high-water or
           low-water limits of the tides