deep-sea

American  

[deep-see] / ˈdipˈsi /

adjective

1. of, pertaining to, in, or associated with the deeper parts of the sea.

   deep-sea fishing; deep-sea diver.

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deep-sea British  

noun

1. (modifier) of, found in, or characteristic of the deep parts of the sea

   deep-sea fishing

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Etymology

Origin of deep-sea

First recorded in 1620–30

Example Sentences

See Examples For:

deep-sea

“I’ve always been fascinated by deep-sea animals,” Pereira said.

From Los Angeles Times ● Sep. 5, 2026

Elements commonly associated with interstellar dust have been found in deep-sea sediment cores, Antarctic snow, and samples from the Moon that correspond to these time periods.

From Science Daily ● Sep. 2, 2026

Conservationists say this and other extraordinary deep-sea snails, limpets, mussels and clams could be threatened by plans to mine valuable minerals from the deep seabed.

From BBC ● Jul. 9, 2026

The agency approached Hughes, the aerospace businessman, to build a massive deep-sea drill-ship called the Hughes Glomar Explorer, and paid him more than $350 million—billions in today’s money.

From The Wall Street Journal ● Jun. 16, 2026

Then I took several quick deep breaths, like a deep-sea diver preparing to submerge, and tapped the logout icon on my display.

From "Ready Player One: A Novel" by Ernest Cline

Related Words

• aquatic
• coastal
• maritime
• naval
• saltwater
• seagoing