undersea

adjective
un·​der·​sea | \ ˌən-dər-ˈsē How to pronounce undersea (audio) \

Definition of undersea

 (Entry 1 of 2)

1 : being or carried on under the sea or under the surface of the sea undersea oil deposits undersea fighting
2 : designed for use under the surface of the sea an undersea fleet

undersea

adverb
\ ˌən-dər-ˈsēz How to pronounce undersea (audio) \
variants: or underseas

Definition of undersea (Entry 2 of 2)

: under the sea : beneath the surface of the sea photographs taken undersea

Examples of undersea in a Sentence

Adjective

They are conducting undersea research.

Recent Examples on the Web: Adjective

Last week, a magnitude 6.9 undersea earthquake caused panic in parts of eastern Indonesia and triggered a tsunami warning. Washington Post, "At least 1 dead after strong quake in eastern Indonesia," 15 July 2019 Oceanographers say the uncertainty arises because the main tools of undersea measurement are sound waves. BostonGlobe.com, "How deep is the deep end of the ocean? The answer turns on an array of factors nearly as wide as the sea itself: the barometric pressure over the site in question, the seawater’s density and temperature, the vagaries of measurement and, perhaps, on whether a world record is at stake.," 17 Sep. 2019 The ice melt in years past would help create big undersea bands -- stretching for miles -- of zooplankton, bait fish and other food that pollock like to eat. Anchorage Daily News, "As Bering Sea ice melts, Alaskans, scientists and Seattle’s fishing fleet witness changes ‘on a massive scale’," 17 Sep. 2019 The ice melt in years past would help create big undersea bands — stretching for miles — of zooplankton, bait fish and other food that pollock like to eat. Hal Bernton, The Seattle Times, "As Bering Sea ice melts, Alaskans, scientists and Seattle’s fishing fleet witness changes ‘on a massive scale’," 15 Sep. 2019 Until disaster struck so close to home, safety worries around scuba diving focused mostly on dangerous marine life and occasional undersea accidents caused by malfunctioning equipment or human error, local diving experts said. Ethan Baron, The Mercury News, "Dive boat tragedy spreads grief, fear through region’s tightly knit dive community," 8 Sep. 2019 The search for Malaysian Airways flight MH370 turned up previously undiscovered undersea volcanoes and trenches. The Economist, "The last of the great explorers," 6 Sep. 2019 Gasoline-free boats are mostly used for recreation, though they could also be used by the military, for tourism boating, or for undersea research. Courtney Linder, Popular Mechanics, "Solar-Powered Yacht? Solar-Powered Yacht.," 28 Aug. 2019 Aerial scans and a few boats have since confirmed that the conglomeration, 58 square miles in area, is pumice coughed up by an undersea volcano. Mark Fischetti, Scientific American, "Don’t Believe the Hype: The Pumice Raft Won’t Save the Great Barrier Reef," 30 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'undersea.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of undersea

Adjective

1613, in the meaning defined at sense 1

Adverb

1645, in the meaning defined above

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Statistics for undersea

Last Updated

5 Oct 2019

Look-up Popularity

Time Traveler for undersea

The first known use of undersea was in 1613

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More Definitions for undersea

undersea

adjective

English Language Learners Definition of undersea

: found, done, or used below the surface of the sea

undersea

adjective
un·​der·​sea | \ ˈən-dər-ˈsē How to pronounce undersea (audio) \

Kids Definition of undersea

1 : being or done under the sea or under the surface of the sea an undersea volcano
2 : used under the surface of the sea an undersea vessel

More from Merriam-Webster on undersea

Rhyming Dictionary: Words that rhyme with undersea

Spanish Central: Translation of undersea

Nglish: Translation of undersea for Spanish Speakers

Comments on undersea

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