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
Examples of tidal in a Sentence
Recent Examples on the Web
The low pressure system is forecast to bring strong southerly winds, generating storm surge that will help contribute to minor to moderate coastal flooding near shorelines and tidal waterways around San Francisco Bay, and from north of Point Reyes southward to Big Sur along the coast.
—
Dinah Voyles Pulver, USA Today, 1 Jan. 2026
Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways.
—Ca Weather Bot, Sacbee.com, 30 Dec. 2025
In 2018, Microsoft deployed a submarine-like data center 117 feet below sea level to take advantage of the cooling benefits of seawater and tidal power to enable the project to be powered fully by renewable energy.
—April Roach, CNBC, 29 Dec. 2025
This risk is compounded during the spectacular king tides — happening Friday and Saturday — the most dramatic tidal swings and lowest tides of the year, which expose these small habitats more than ever.
—Lillie Mulligan, San Diego Union-Tribune, 29 Dec. 2025
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Dinah Voyles Pulver, USA Today, 1 Jan. 2026
Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways.
—Ca Weather Bot, Sacbee.com, 30 Dec. 2025
In 2018, Microsoft deployed a submarine-like data center 117 feet below sea level to take advantage of the cooling benefits of seawater and tidal power to enable the project to be powered fully by renewable energy.
—April Roach, CNBC, 29 Dec. 2025
This risk is compounded during the spectacular king tides — happening Friday and Saturday — the most dramatic tidal swings and lowest tides of the year, which expose these small habitats more than ever.
—Lillie Mulligan, San Diego Union-Tribune, 29 Dec. 2025
See All Example Sentences for tidal
Cite this Entry
“Tidal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tidal. Accessed 3 Jan. 2026.
Copy CitationKids Definition
tidal
adjective
tid·al
ˈtīd-ᵊl 
: of or relating to tides : rising and falling or flowing and ebbing at regular times
Medical Definition
tidal
adjective
tid·al
ˈtīd-ᵊl
: of, relating to, or constituting tidal air
interference with the normal tidal exchange of the lungs—F. R. Mautz & R. M. Hosler
F. R. Mautz & R. M. HoslerLove words? Need even more definitions?
Merriam-Webster unabridged
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