Synonyms of deep-seanext
: of, relating to, or occurring in the deeper parts of the sea
deep-sea fishing

Examples of deep-sea in a Sentence

chartered a boat to do some deep-sea fishing
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Tommy Thompson, a former deep-sea treasure hunter, is seen in an undated photo provided by the Delaware County Sheriff's Office. CBS News, 10 Mar. 2026 Anthropogenic material, the observations show, has become woven into deep-sea ecosystems even in environments that might seem entirely beyond the reach of human activity. Ryan Brennan, Kansas City Star, 10 Mar. 2026 Voice 370, representing the families of some of those aboard the missing plane, urged the government to extend Ocean Infinity's contract and to consider similar arrangements with other deep-sea exploration companies. ABC News, 8 Mar. 2026 Weston earned his radio and TV certificate in 1965, leaving the research facility a year later to join Divcon (now part of Oceaneering International), a commercial diving company based in London that developed deep-sea helium diving helmets. IEEE Spectrum, 5 Mar. 2026 See All Example Sentences for deep-sea

Word History

First Known Use

circa 1625, in the meaning defined above

Time Traveler
The first known use of deep-sea was circa 1625

Browse Nearby Words

Cite this Entry

“Deep-sea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep-sea. Accessed 15 Mar. 2026.

Kids Definition

deep-sea

adjective
ˌdēp-ˌsē
: of, relating to, or occurring in the deeper parts of the sea
deep-sea fishing
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster