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.
And a growing coalition of 40 countries is now backing a moratorium on deep-sea mining, raising environmental, governance, and scientific concerns. Jake Angelo, Fortune, 15 May 2026 Although no deep-sea mining is yet underway in these areas, at least two of the vents that the snails live on have been considered for possible operations, according to the IUCN. Adam Kovac, Scientific American, 15 May 2026 Navigating the Long Tau river requires these deep-sea leviathans to turn on a dime, making for some spectacular viewing. Loz Blain may 14, New Atlas, 14 May 2026 Its modular design also enables operators to install additional battery packs for extended operations or advanced sensor systems for deep-sea reconnaissance and seabed mapping. Bojan Stojkovski, Interesting Engineering, 10 May 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 21 May. 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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