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 development marked the first ship-to-ship commercial ethanol bunkering of a deep-sea container vessel in the United States. — Prabhat Ranjan Mishra, Interesting Engineering, 3 Oct. 2026

The equipment was part of a network of 900 deep-sea instruments that had been anchored off Oregon, Washington State, Alaska, North Carolina, and an area between Greenland and Iceland known as the Irminger Sea. — Eric Niiler, New York Times, 3 Oct. 2026

The refinery was initially planned to be built in Tanzania’s coastal town of Tanga, but Dangote said it was later determined that Lamu had deeper waters, solid ground capable of supporting the heavy equipment, and deep-sea access. — Evelyne Musambi, Fortune, 30 Sep. 2026

For next steps, the researchers plan to scale the technology into larger structures and prove its long-term durability in real marine and deep-sea conditions. — New Atlas, 20 Sep. 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