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
Kennedy WarneExamples of seabed in a Sentence
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The search was carried out for 28 days in two phases — March 25–28 last year and Dec 31, 2025, to Jan 23 this year, covering about 7,571 square kilometers (2,923 square miles) of seabed, the bureau said.
—ABC News, 8 Mar. 2026
This archipelago is the result of ancient volcanic activity—the remnants of which can be seen in the islands’ high, steep cliffs, their multitude of sea caves, and crystal-clear seabeds surrounded by Mediterranean vegetation.
—Micol Passariello, Architectural Digest, 26 Feb. 2026
Jamieson said the photographed shark maintained a depth of around 1,640 feet along a seabed that sloped into deeper water.
—Hanna Wickes, Charlotte Observer, 19 Feb. 2026
The photographed shark was maintaining a depth of around 500 meters (1,640 feet) along a seabed that sloped into much deeper water.
—CNN Money, 18 Feb. 2026
See All Example Sentences for seabed
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ABC News, 8 Mar. 2026
This archipelago is the result of ancient volcanic activity—the remnants of which can be seen in the islands’ high, steep cliffs, their multitude of sea caves, and crystal-clear seabeds surrounded by Mediterranean vegetation.
—Micol Passariello, Architectural Digest, 26 Feb. 2026
Jamieson said the photographed shark maintained a depth of around 1,640 feet along a seabed that sloped into deeper water.
—Hanna Wickes, Charlotte Observer, 19 Feb. 2026
The photographed shark was maintaining a depth of around 500 meters (1,640 feet) along a seabed that sloped into much deeper water.
—CNN Money, 18 Feb. 2026
See All Example Sentences for seabed
Cite this Entry
“Seabed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seabed. Accessed 13 Mar. 2026.
Copy CitationKids Definition
seabed
noun
sea·bed
ˈsē-ˌbed 
: the floor of a sea or ocean
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Merriam-Webster unabridged
