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
Hotter, buoyant mantle rock rises; colder, denser slabs of ancient seafloor sink.
—Samantha Mathewson, Space.com, 25 Feb. 2026
Matthew Holland, a postdoctoral researcher in medicinal chemistry at the UK’s University of Oxford, said that researchers were searching in new and extreme environments, such as ice caves and the seafloor, for biomolecules that could be developed into new antibiotic drugs.
—Katie Hunt, CNN Money, 20 Feb. 2026
The shark had apparently found the most hospitable band within that stack and was tracking it along the seafloor.
—Hanna Wickes, Miami Herald, 19 Feb. 2026
Scientists already knew skates inhabit waters that far south, but its presence alongside the shark adds to the picture of the deep Antarctic seafloor community.
—Hanna Wickes, Kansas City Star, 19 Feb. 2026
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.
Samantha Mathewson, Space.com, 25 Feb. 2026
Matthew Holland, a postdoctoral researcher in medicinal chemistry at the UK’s University of Oxford, said that researchers were searching in new and extreme environments, such as ice caves and the seafloor, for biomolecules that could be developed into new antibiotic drugs.
—Katie Hunt, CNN Money, 20 Feb. 2026
The shark had apparently found the most hospitable band within that stack and was tracking it along the seafloor.
—Hanna Wickes, Miami Herald, 19 Feb. 2026
Scientists already knew skates inhabit waters that far south, but its presence alongside the shark adds to the picture of the deep Antarctic seafloor community.
—Hanna Wickes, Kansas City Star, 19 Feb. 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 1 Mar. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
