tidemark

[ tahyd-mahrk ]
/ ˈtaɪdˌmɑrk /

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.

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Origin of tidemark

First recorded in 1790–1800; tide1 + mark1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for tidemark

  • This was the tidemark of a friendly bite Cleg had given to a friend, in whose double row were no gaps.

    Cleg Kelly, Arab of the City|S. R. (Samuel Rutherford) Crockett

British Dictionary definitions for tidemark

tidemark
/ (ˈtaɪdˌmɑːk) /

noun

a mark left by the highest or lowest point of a tide
a marker indicating the highest or lowest point reached by a tide
mainly British a mark showing a level reached by a liquida tidemark on the bath
informal, mainly British a dirty mark on the skin, indicating the extent to which someone has washed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for tidemark

tidemark
[ tīdmärk′ ]

A line or mark on a shore indicating the highest or lowest level reached by the tide.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.