deep-sea

adjective

ˈdēp-ˈsē 

: of, relating to, or occurring in the deeper parts of the sea

deep-sea fishing

Synonyms of deep-sea

• oceanic

Examples of deep-sea in a Sentence

chartered a boat to do some deep-sea fishing

Recent Examples on the Web

The first deep-sea scientist from the Seychelles dives below the surface of the Indian Ocean. — Tanya Fedak, Variety, 22 Oct. 2026

In April this year, the parties again teamed up to develop, build and operate a new deep-sea terminal in Da Nang, known as the Lien Chieu Container Port. — Glenn Taylor, Footwear News, 21 Oct. 2026

When a whale dies and sinks to the ocean floor, its carcass provides sustenance for deep-sea organisms for centuries, triggering a shockwave of life. — Brian Davids, HollywoodReporter, 20 Oct. 2026

These viruses infect diverse deep-sea prokaryotes that drive vital cycles of carbon, nitrogen, phosphorus, sulfur, and metals. — Mrigakshi Dixit, Interesting Engineering, 14 Oct. 2026

Word History

First Known Use

circa 1625, in the meaning defined above

Rhymes for deep-sea

• agree
• allee
• banshee
• beastly
• bibi
• bowsprit
• carefree
• cerci
• chablis
• cowpea
• crappie
• crappy

Kids Definition

deep-sea

adjective

ˌdēp-ˌsē

: of, relating to, or occurring in the deeper parts of the sea

deep-sea fishing