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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Perhaps, some reasoned, those squiggles were responsible for painting the world’s soil and seafloor sediments red, by ushering in the very first poofs of oxygen.
—Laura Poppick, Rolling Stone, 30 June 2025
As parts of the colliding plates and seafloor are pushed into Earth’s mantle, blobs of molten rock rise upwards and come into contact with water and gases, resulting in highly-explosive mix on the surface.
—David Bressan, Forbes.com, 20 June 2025
That's roughly twice as tall as Earth’s largest volcano, Mauna Loa in Hawaii, which rises six miles above the seafloor.
—Eric Lagatta, USA Today, 18 June 2025
The Hard Work of Sea Cucumbers There are over 1,000 species of sea cucumbers slinking along seafloors all across the world.
—Jack Knudson, Discover Magazine, 10 June 2025
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Laura Poppick, Rolling Stone, 30 June 2025
As parts of the colliding plates and seafloor are pushed into Earth’s mantle, blobs of molten rock rise upwards and come into contact with water and gases, resulting in highly-explosive mix on the surface.
—David Bressan, Forbes.com, 20 June 2025
That's roughly twice as tall as Earth’s largest volcano, Mauna Loa in Hawaii, which rises six miles above the seafloor.
—Eric Lagatta, USA Today, 18 June 2025
The Hard Work of Sea Cucumbers There are over 1,000 species of sea cucumbers slinking along seafloors all across the world.
—Jack Knudson, Discover Magazine, 10 June 2025
See All Example Sentences for seafloor
Cite this Entry
“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 18 Jul. 2025.
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