[ tahyd-l ]
/ ˈtaɪd l /


of, pertaining to, characterized by, or subject to tides: a tidal current.
dependent on the state of the tide as to time of departure: a tidal steamer.

Origin of tidal

First recorded in 1800–10; tide1 + -al1

Related forms

tid·al·ly, adverbnon·tid·al, adjectiveun·tid·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tidal

British Dictionary definitions for tidal


/ (ˈtaɪdəl) /


relating to, characterized by, or affected by tidesa tidal estuary
dependent on the state of the tidea tidal ferry
(of a glacier) reaching the sea and discharging floes or icebergs

Derived Forms

tidally, adverb
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

Medicine definitions for tidal


[ tīdl ]


Resembling the tides; alternately rising and falling.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.