variants
or less commonly sea floor
plural seafloors also sea floors
: the floor of a sea or ocean : seabed
The Earth's crust, in this view, is divided into several immense plates that make up the continents and seafloors, and that all float on a hot, plastic, subterranean "mantle."—
Walter Sullivan
Walter SullivanExamples of seafloor in a Sentence
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Researchers have discovered an extraordinary underwater cache of shipwrecks across 328 feet of seafloor in northeastern Libya, illuminating a once-thriving ancient port.
—Maria Mocerino, Interesting Engineering, 14 Mar. 2026
On the seafloor, the nodules are vital habitat, part of a fragile ecosystem of marine species that are adapted to the dark, cold environment.
—Lauren Sommer, NPR, 13 Mar. 2026
Before the expedition, only 14 animal species were known to inhabit the area’s cold seeps — places on the ocean floor where gases and fluids leak from below the seafloor.
—Ryan Brennan, Miami Herald, 11 Mar. 2026
Once debris reaches the seafloor, its fate varies by material.
—Ryan Brennan, Kansas City Star, 10 Mar. 2026
See All Example Sentences for seafloor
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Maria Mocerino, Interesting Engineering, 14 Mar. 2026
On the seafloor, the nodules are vital habitat, part of a fragile ecosystem of marine species that are adapted to the dark, cold environment.
—Lauren Sommer, NPR, 13 Mar. 2026
Before the expedition, only 14 animal species were known to inhabit the area’s cold seeps — places on the ocean floor where gases and fluids leak from below the seafloor.
—Ryan Brennan, Miami Herald, 11 Mar. 2026
Once debris reaches the seafloor, its fate varies by material.
—Ryan Brennan, Kansas City Star, 10 Mar. 2026
See All Example Sentences for seafloor
Cite this Entry
“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 23 Mar. 2026.
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