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
Traditional tsunami monitoring relies heavily on Deep-ocean Assessment and Reporting of Tsunamis (DART) buoys, which measure pressure changes at the seafloor.
—Stefanie Waldek, Space.com, 7 Apr. 2026
Oil stalagmites emerge from the seafloor, pulled upward by their buoyancy.
—Jeffrey Marlow, New Yorker, 5 Apr. 2026
The research vessels were equipped with cameras that live streamed videos of the seafloor to streaming platforms YouTube and Twitch—and the videos went viral in Argentina.
—K. R. Callaway, Scientific American, 3 Apr. 2026
Love in the dark The deep ocean is a challenging place to find a partner, especially since octopuses are solitary animals that wander the seafloor alone, mating only during highly infrequent encounters.
—Jacek Krywko, ArsTechnica, 2 Apr. 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.
Stefanie Waldek, Space.com, 7 Apr. 2026
Oil stalagmites emerge from the seafloor, pulled upward by their buoyancy.
—Jeffrey Marlow, New Yorker, 5 Apr. 2026
The research vessels were equipped with cameras that live streamed videos of the seafloor to streaming platforms YouTube and Twitch—and the videos went viral in Argentina.
—K. R. Callaway, Scientific American, 3 Apr. 2026
Love in the dark The deep ocean is a challenging place to find a partner, especially since octopuses are solitary animals that wander the seafloor alone, mating only during highly infrequent encounters.
—Jacek Krywko, ArsTechnica, 2 Apr. 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 9 Apr. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
