seabed

noun

sea·​bed ˈsē-ˌbed 

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

Examples of seabed in a Sentence

Recent Examples on the Web

The boat is believed to be submerged on the rocky seabed in water 120 feet (36 meters) deep. — ABC News, 17 July 2026

Norway has also made clear its ambition to mine a huge stretch of Arctic seabed around Svalbard and beyond for critical minerals. — Laura Paddison, CNN Money, 10 July 2026

The technology is an autonomous underwater vehicle (AUV) paired with its own seabed docking station. — New Atlas, 5 July 2026

Naturally, the exploration of our planet, from seabed to stratosphere, is the focus of its new Museum of Exploration. — Fritz Hahn, Washington Post, 2 July 2026

Word History

First Known Use

1838, in the meaning defined above

Phrases Containing seabed

• the seabed

Rhymes for seabed

• abed
• ahead
• beachhead
• bedspread
• bedstead
• behead
• blackhead
• blockhead
• bloodshed
• bowhead
• breastfed
• bridgehead

Kids Definition

seabed

noun

sea·​bed ˈsē-ˌbed 

: the floor of a sea or ocean