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
ˈtī-dᵊl-ē How to pronounce tidal (audio)
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.
The World Meteorological Organization (WMO) estimates that 300,000 to 500,000 people died, most from the surge flooding coastal islands and tidal flats. — Kaif Shaikh, Interesting Engineering, 6 Sep. 2026 Pooling of sea water is possible around high tide at beach areas that is uncommon with normal tidal ranges. — Ca Weather Bot, Sacbee.com, 4 Sep. 2026 These are questions for future missions, but the tidal tomography technique could be employed for other worlds too, from Mercury to the large moons of Jupiter. — Keith Cooper, Space.com, 31 Aug. 2026 Among the habitats Steinbach filmed are tidal floodplain forests, a landscape type that has largely disappeared in Europe. — Scott Roxborough, HollywoodReporter, 28 Aug. 2026 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

Phrases Containing tidal

Rhymes for tidal

See All Rhymes for tidal

Browse Nearby Words

tid
tidal
tidal amplitude
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Cite this Entry

“Tidal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tidal. Accessed 7 Sep. 2026.

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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 lungs—F. R. Mautz & R. M. Hosler
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