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 system comprising a six seabed landers has been deployed at the Endurance CO₂ store, around 93 miles (150 kilometers) off the coast of Teesside, before carbon dioxide injection begins. — Muskan Bhatia, Interesting Engineering, 11 Nov. 2026

Species living on sandy seabeds or those with very different body shapes and arm lengths might use different strategies to negotiate openings, Kuba added. — Reuters, NBC news, 6 Nov. 2026

The arrangement does not grant Indigenous peoples ownership of the sea or seabed, but protects the area’s ancestral uses, including fishing, shellfish and seaweed gathering, as well as access to sacred sites and areas used for navigation. — ABC News, 28 Oct. 2026

Pictures show divers working among piles of ancient pottery, with ceramic plates and bowls scattered across the sandy seabed. — Andrea Margolis, FOXNews.com, 9 Oct. 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