[ tahyd-mahrk ]
See synonyms for: tidemarktidemarks on Thesaurus.com

  1. the point that something or someone has reached, receded below, or risen above: He has reached the tidemark of his prosperity.

  2. a mark left by the highest or lowest point of a tide.

  1. a mark made to indicate the highest or lowest point of a tide.

Origin of tidemark

First recorded in 1790–1800; tide1 + mark1

Words Nearby tidemark

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use tidemark in a sentence

  • Mr. Cahoon's countenance—that portion of it above the whisker tidemark, of course—registered horror at the thought.

    Fair Harbor | Joseph Crosby Lincoln
  • 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


/ (ˈtaɪdˌmɑːk) /

  1. a mark left by the highest or lowest point of a tide

  2. a marker indicating the highest or lowest point reached by a tide

  1. mainly British a mark showing a level reached by a liquid: a tidemark on the bath

  2. 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


[ tīdmärk′ ]

  1. 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.