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
In the shallow reefs off the coast of southwestern Japan, a small fish scuttles along the rocky seafloor.
—Irene Wright, Miami Herald, 26 June 2025
In these marine habitats where sunlight can’t reach, gas escapes through cracks in the seafloor and feeds bacteria that latch on to the spiders’ exoskeletons.
—Jackie Wattles, CNN Money, 21 June 2025
In early March, the French Navy was conducting an exploratory deep-sea operation off southeastern France when sonar detected a large shape on the seafloor.
—Sarah Kuta, Smithsonian Magazine, 18 June 2025
Two large pieces of construction equipment — a compact loader called a skid steer and a 20-ton crane used for driving piles into the seafloor — tumbled into the water.
—Hailey Branson-Potts, Los Angeles Times, 8 June 2025
See All Example Sentences for seafloor
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Irene Wright, Miami Herald, 26 June 2025
In these marine habitats where sunlight can’t reach, gas escapes through cracks in the seafloor and feeds bacteria that latch on to the spiders’ exoskeletons.
—Jackie Wattles, CNN Money, 21 June 2025
In early March, the French Navy was conducting an exploratory deep-sea operation off southeastern France when sonar detected a large shape on the seafloor.
—Sarah Kuta, Smithsonian Magazine, 18 June 2025
Two large pieces of construction equipment — a compact loader called a skid steer and a 20-ton crane used for driving piles into the seafloor — tumbled into the water.
—Hailey Branson-Potts, Los Angeles Times, 8 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 11 Jul. 2025.
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