tidal

adjective

tid·​al ˈtī-dᵊl How to pronounce tidal (audio)
1
a
: of, relating to, caused by, or having tides
tidal cycles
tidal erosion
b
: periodically rising and falling or flowing and ebbing
tidal waters
2
: dependent (as to the time of arrival or departure) upon the state of the tide
a tidal steamer
tidally adverb

Examples of tidal in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Right now, Donnelly is working on a model to help predict where in the Indian River Lagoon living shorelines are most likely to succeed, based on variables like tidal conditions and wave energy thresholds for different plants. Molly Duerig, Miami Herald, 28 June 2025 The company’s Starbase launch facility in South Texas abuts the Boca Chica Wildlife Refuge, an expanse of tidal flats, mangroves and sand dunes that is home to rare and endangered species including ocelots, sea turtles and northern aplomado falcons. Kate Linthicum, Los Angeles Times, 27 June 2025 Once a tidal flat, this region would have been periodically flooded millions of years ago. Lydia Patrick, MSNBC Newsweek, 26 June 2025 Up to one quarter foot of saltwater inundation above ground level is possible near shorelines and tidal waterways. Ca Weather Bot, Sacbee.com, 25 June 2025 See All Example Sentences for tidal

Word History

First Known Use

1807, in the meaning defined at sense 1a

Time Traveler
The first known use of tidal was in 1807

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Cite this Entry

“Tidal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tidal. Accessed 9 Jul. 2025.

Kids Definition

tidal

adjective
tid·​al ˈtīd-ᵊl How to pronounce tidal (audio)
: of or relating to tides : rising and falling or flowing and ebbing at regular times

Medical Definition

tidal

adjective
tid·​al ˈtīd-ᵊl How to pronounce tidal (audio)
: of, relating to, or constituting tidal air
interference with the normal tidal exchange of the lungsF. R. Mautz & R. M. Hosler

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