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.
An officer, Casillas also became a qualified deep-sea diver while based in Korea. Bob Goldsborough, Chicago Tribune, 3 June 2026 Critics dispute these claims and say the environmental damage of deep-sea mining could last decades or more. Harry Stevens, New York Times, 3 June 2026 And the non-terrestrial intelligence is clearly modeled on existing forms of deep-sea life. Jenny Odell, Longreads, 2 June 2026 Developed by Vard’s in-house design studio, in collaboration with Inkfish, YTMC, and the Fincantieri Group, the new RV11000 was tailor-made for seafloor mapping and deep-sea exploration. Rachel Cormack, Robb Report, 1 June 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

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Cite this Entry

“Deep-sea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deep-sea. Accessed 11 Jun. 2026.

Kids Definition

deep-sea

adjective
ˌdēp-ˌsē
: of, relating to, or occurring in the deeper parts of the sea
deep-sea fishing
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