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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Byrne's team assessed the potential for tectonic activity on Europa's seafloor with a new model that factored in stresses from gravitational tides incurred by Jupiter, the long-term contraction of the moon as its interior gradually cools and the convection of heat energy through the mantle.
—Keith Cooper, Space.com, 9 Jan. 2026
Scientists believe Europa's seafloor is likely tectonically quiet, without active volcanoes or hot water plumes.
—Eric Lagatta, USA Today, 8 Jan. 2026
Off the coast of Greenland, the deep seafloor is littered with towering mounds made of crystallized methane and other gases.
—Claire Cameron, Scientific American, 25 Dec. 2025
Ship of Dreams details both the catastrophe and its legacy, beginning at a Belfast dry dock and ending with the OceanGate Titan submersible disaster, which happened en route to the Titanic’s seafloor resting place.
—Benjamin Cannon, The Atlantic, 23 Dec. 2025
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Keith Cooper, Space.com, 9 Jan. 2026
Scientists believe Europa's seafloor is likely tectonically quiet, without active volcanoes or hot water plumes.
—Eric Lagatta, USA Today, 8 Jan. 2026
Off the coast of Greenland, the deep seafloor is littered with towering mounds made of crystallized methane and other gases.
—Claire Cameron, Scientific American, 25 Dec. 2025
Ship of Dreams details both the catastrophe and its legacy, beginning at a Belfast dry dock and ending with the OceanGate Titan submersible disaster, which happened en route to the Titanic’s seafloor resting place.
—Benjamin Cannon, The Atlantic, 23 Dec. 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 17 Jan. 2026.
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