variants
or less commonly sea bed
plural seabeds also sea beds
: the floor of a sea or ocean : seafloor
This atoll is the summit of an undersea volcano that rises from the seabed 10,000 feet below the surface.—
Kennedy Warne
Kennedy WarneExamples of seabed in a Sentence
Recent Examples on the Web
The hull has been optimized specifically for high-precision seabed mapping—one of the most important tools in modern oceanography—and, while not the sexiest feature, RV11000 will also carry the largest battery installation ever fitted on a ship.
—Dea Jusufi, Forbes.com, 13 June 2026
Networks of green energy cables carrying electricity are also starting to sprawl across the world’s seabeds.
—Tim Lister, CNN Money, 31 May 2026
Undersea mudslides occasionally damage cables, too, and future seabed mining could eventually add another hazard.
—Ramin Skibba, Scientific American, 27 May 2026
Because the jagged, shallow seabed near the fjord’s mouth acted like a speed bump that sapped the wave’s energy, people onboard the cruise ship came out of the event unscathed.
—Jacek Krywko, ArsTechnica, 10 May 2026
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Dea Jusufi, Forbes.com, 13 June 2026
Networks of green energy cables carrying electricity are also starting to sprawl across the world’s seabeds.
—Tim Lister, CNN Money, 31 May 2026
Undersea mudslides occasionally damage cables, too, and future seabed mining could eventually add another hazard.
—Ramin Skibba, Scientific American, 27 May 2026
Because the jagged, shallow seabed near the fjord’s mouth acted like a speed bump that sapped the wave’s energy, people onboard the cruise ship came out of the event unscathed.
—Jacek Krywko, ArsTechnica, 10 May 2026
See All Example Sentences for seabed
Cite this Entry
“Seabed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seabed. Accessed 24 Jun. 2026.
Copy CitationKids Definition
seabed
noun
sea·bed
ˈsē-ˌbed 
: the floor of a sea or ocean
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