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
Recent Examples on the Web
Heavier objects sank straight to the seafloor, but lighter debris went down at a slower rate, and ocean currents carried them farther away.
—Katie Hunt, CNN Money, 31 Aug. 2025
The seafloor of the Ediacaran sea — as suggested by fossil evidence — was covered by a dense microbial mat.
—David Bressan, Forbes.com, 30 Aug. 2025
Already, the change has started eating away at the oceans’ physical infrastructure– from shellfish aggregations and coral reefs to the seafloor.
—Lauren Leffer, Popular Science, 27 Aug. 2025
The Haidou-1 will be responsible for multi-disciplinary seafloor sampling and supporting other deep-sea scientific objectives.
—Sujita Sinha, Interesting Engineering, 25 Aug. 2025
See All Example Sentences for seafloor
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Katie Hunt, CNN Money, 31 Aug. 2025
The seafloor of the Ediacaran sea — as suggested by fossil evidence — was covered by a dense microbial mat.
—David Bressan, Forbes.com, 30 Aug. 2025
Already, the change has started eating away at the oceans’ physical infrastructure– from shellfish aggregations and coral reefs to the seafloor.
—Lauren Leffer, Popular Science, 27 Aug. 2025
The Haidou-1 will be responsible for multi-disciplinary seafloor sampling and supporting other deep-sea scientific objectives.
—Sujita Sinha, Interesting Engineering, 25 Aug. 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 10 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share