adjective
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relating to, characterized by, or affected by tides
a tidal estuary
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dependent on the state of the tide
a tidal ferry
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(of a glacier) reaching the sea and discharging floes or icebergs
Other Word Forms
Etymology
Origin of tidal
Explanation
Anything tidal is related to the regular rise and fall of the sea level due to gravitational forces. A marine biologist might study the effects of tidal patterns on local sea life. Tidal conditions are caused by many things, from the rotation of the Earth to the position of the Moon, and tidal effects can be seen not just in the ocean tide itself, but in rivers, lakes, and currents, and even on the Earth's surface. A common name for a tsunami is a "tidal wave," although these earthquake-caused surges of ocean water don't actually have any connection to tides.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
There’s a tidal change happening in youth culture that is tied to inaccessibility, a response to the devaluing of making art, that’s exciting to see.
From Los Angeles Times • May 12, 2026
The last of what Lamont calls “the four horsemen” of a bubble is a tidal wave of stock issuance.
From The Wall Street Journal • May 8, 2026
The River Nith is tidal and water levels can rise and fall rapidly.
From BBC • May 2, 2026
After huge equity issuance in the years preceding, there was a tidal wave of IPO lock-up periods expiring that created a never-ending cascade of selling, Jones recalls.
From MarketWatch • Apr. 28, 2026
Harry braced himself for a tidal wave of fury.
From "Harry Potter And The Chamber Of Secrets" by J. K. Rowling
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
