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

Venezuela's constitution states that the nation owns all mineral and hydrocarbon deposits — its oil and natural gas reserves — within its own territory, including those that lie beneath the country's seabed. —Aimee Picchi, CBS News, 9 Jan. 2026

This is the French agency’s second acquisition of a DriX system, reinforcing the platform’s growing reputation in seabed mapping and maritime data collection. —Georgina Jedikovska, Interesting Engineering, 9 Jan. 2026

To begin construction, the male pushes its belly on the sandy seabed to make a central spot in the future circle. —New Atlas, 3 Jan. 2026

The company will use underwater vehicles, deep sea drones and advanced scanning technology across a 6,000-square-mile swath of the Indian Ocean seabed. —Peter Guo, NBC news, 30 Dec. 2025

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