sea·​bed ˈsē-ˌbed How to pronounce seabed (audio)
variants or less commonly sea bed
plural seabeds also sea beds
: the floor of a sea or ocean : seafloor
This atoll is the summit of an undersea volcano that rises from the seabed 10,000 feet below the surface.Kennedy Warne

Example Sentences

Recent Examples on the Web These questions echo larger concerns about the harm some scientists fear large-scale seabed mining may cause. Eric Lipton, New York Times, 29 Aug. 2022 With scant evidence from the seabed, a breakthrough may rely on intelligence service wiretaps and human sources. Justin Scheck, New York Times, 26 Dec. 2022 Before Ida, a faculty biologist named Craig McClain had been working on a study of the benthic communities—the life in and on the seabed—in Terrebonne Bay. Boyce Upholt, WIRED, 19 Nov. 2022 Some dolphins carry sea sponges in their mouths, using them to stir up the sand on the seabed while protecting their snouts from sharp pieces of rock or coral. Joshua Rapp Learn, Discover Magazine, 18 Nov. 2022 The fate of the planet’s last untouched wilderness, the deep ocean, is under threat as a secretive organization is about to allow massive extraction of seabed metals to address the world’s energy crisis. Peter Debruge, Variety, 7 Dec. 2022 Most of the hull to the height of the lower battery deck has been preserved, protruding six to seven meters (20-23 feet) from the seabed, according to the museum. Hafsa Khalil, CNN, 25 Oct. 2022 Some oil-and-gas industry supporters say the pressure from Republicans in the House could help secure a regular schedule of sales of oil-and-gas drilling leases on federal land and the seabed. Phred Dvorak, WSJ, 28 Nov. 2022 It is thought to be a featureless, muddy seabed without much structure. Taylor Nicioli, CNN, 7 Nov. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seabed.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1838, in the meaning defined above

Time Traveler
The first known use of seabed was in 1838

Dictionary Entries Near seabed

Cite this Entry

“Seabed.” Dictionary, Merriam-Webster, Accessed 30 Jan. 2023.

Kids Definition


sea·​bed ˈsē-ˌbed How to pronounce seabed (audio)
: the floor of a sea or ocean

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