Synonyms

deep-sea

American

[deep-see] / ˈdipˈsi /

adjective

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

deep-sea fishing; deep-sea diver.

deep-sea British

noun

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

deep-sea fishing

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of deep-sea

First recorded in 1620–30

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"These are little octopuses that live in the deep sea, and hardly anybody on Earth has ever gotten to see them. I just feel lucky that I got to work with them," says Voight.

From Science Daily • May 25, 2026

In addition, they are prevalent throughout the environment — in alpine snow, deep sea sediment and drinking water.

From Los Angeles Times • Apr. 2, 2026

Takaichi said Wednesday that she and Trump would also discuss joint development with the United States of deep sea rare earths off a remote Pacific island.

From Barron's • Mar. 19, 2026

Also in Dubai, debris from an "aerial interception" caused a fire in a berth at the Jebel Ali deep sea port - the world's ninth busiest.

From BBC • Mar. 1, 2026

“I wonder whatever happened to that guy McKinley Moran. Remember that deep sea diver?”

From "Cannery Row" by John Steinbeck

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023