seafloor

noun

sea·​floor ˈsē-ˌflȯr How to pronounce seafloor (audio)
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

Examples of seafloor in a Sentence

Recent Examples on the Web
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.
The cavities were about four inches beneath the seafloor and filled with 77 degree Fahrenheit water. Margherita Bassi, Smithsonian Magazine, 23 Oct. 2024 Direct evidence of animal life beneath the seafloor would require more heavy lifting — literally. Ashley Strickland, CNN, 16 Oct. 2024 Hydrothermal vents, which were first discovered on Earth in 1977 in the Galapagos Rift, may be scattered across the Europan seafloor too, further heating the water. Jeffrey Kluger, TIME, 4 Oct. 2024 There were other problems to solve, too, not least how the bulk of the Deep Pots cargo—the porcelain and the canes on the seafloor—could have been carried by the Modena. Sam Knight, The New Yorker, 4 Nov. 2024 See all Example Sentences for seafloor 

Word History

First Known Use

1853, in the meaning defined above

Time Traveler
The first known use of seafloor was in 1853

Dictionary Entries Near seafloor

Cite this Entry

“Seafloor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seafloor. Accessed 23 Nov. 2024.

Kids Definition

seafloor

noun
sea·​floor -ˌflō(ə)r How to pronounce seafloor (audio)
-ˌflȯ(ə)r
: seabed

More from Merriam-Webster on seafloor

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!