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undersea

American  
[uhn-der-see] / ˈʌn dərˌsi /

adjective

  1. located, carried on, or used under the surface of the sea.

    undersea life.

adverb

  1. underseas.

undersea British  
/ ˈʌndəˌsiː /

adjective

  1. below the surface of the sea

"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 undersea

First recorded in 1605–15; under- + sea

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.

They will react to stress on the nodes that keep its economy functioning: secure communications, continuity of government, ports and logistics hubs, undersea cables, satellite links, supply chains, and financial systems.

From Barron's

They will react to stress on the nodes that keep its economy functioning: secure communications, continuity of government, ports and logistics hubs, undersea cables, satellite links, supply chains, and financial systems.

From Barron's

The same modeling approach could eventually help scientists simulate tsunamis triggered by undersea earthquakes.

From Science Daily

Finnish police have detained a vessel suspected of damaging an undersea telecoms cable running from Helsinki to Estonia across the Gulf of Finland.

From BBC

The routes of competing undersea cables are convoluted and geopolitically tangled.

From The Wall Street Journal

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.