ma·​rine | \ mə-ˈrēn How to pronounce marine (audio) \

Definition of marine

 (Entry 1 of 2)

1a : of or relating to the sea marine life marine biology
b : of or relating to the act or practice of sailing over the sea : nautical a marine chart
c : of or relating to the commerce (see commerce entry 1 sense 2) of the sea : maritime marine law
d : depicting the sea, seashore, or ships a marine painter
2 : of or relating to marines (see marine entry 2 sense 2) marine barracks



Definition of marine (Entry 2 of 2)

1a : the mercantile and naval shipping of a country
b : seagoing ships especially in relation to nationality or class
2 : one of a class of armed services personnel serving on shipboard or in close association with a naval force specifically : a member of the U.S. Marine Corps
3 : an executive department (as in France) having charge of naval affairs
4 : a marine picture : seascape

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Synonyms for marine

Synonyms: Adjective

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Examples of marine in a Sentence

Adjective marine animals such as dolphins and whales he loves collecting little marine creatures while at the beach Noun He is a former U.S. Marine. the U.S. Army, Navy, Air Force, and Marines
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Recent Examples on the Web: Adjective There have been so few experiments to give scientists an idea of what mining might do to the seabed and the surrounding marine environment that the cancellation of the test was met with disappointment even among conservationists. Alex Fox, Smithsonian Magazine, "Deep-Sea Mining’s Environmental Toll Could Last Decades," 1 May 2020 Although the method has been used to send and receive data through water in the past, it has been used across calm water and not necessarily water representative of a real-world marine environment. Kyle Mizokami, Popular Mechanics, "Quantum Communication Could Make U.S. Subs Even More Deadly," 22 Apr. 2020 But according to Oceana, as much as 60 million gallons of oil could still remain in the marine environment. NBC News, "Ten years after Deepwater disaster, scientists and activists worry no lessons have been learned," 20 Apr. 2020 Keep an eye on the marine environment via the Monterey Bay Aquarium. Gregory Thomas,, "Watching California’s wildlife online surges during shelter-in-place," 9 Apr. 2020 It's all made from recycled plastic, some of which has been collected from coastlines and other marine environments, which Rothy's then turns into a flexible thread. Madison Flager, Condé Nast Traveler, "Rothy’s New Machine-Washable Cross-Body Is Made to Last," 5 Mar. 2020 Last year, researchers in Virginia released a study about the local problem of balloon litter in the marine environment. USA TODAY, "Rock slides wreak havoc, close encounters with great white shark, gray whale: News from around our 50 states," 14 Feb. 2020 The broader Arctic Report Card shows the region is undergoing extensive changes in the marine environment as well as frozen lands. Andrew Freedman, Anchorage Daily News, "The Arctic may have crossed key threshold in a long-dreaded climate feedback," 11 Dec. 2019 These offerings include familiar names in science like Bill Nye, along with other perhaps less famous scientists like marine biologist and oceanographer Sylvia Earle who may inspire you to become an environmental activist from quarantine. Shannon Carlin,, "The 19 Best Environmental Shows & Documentaries On Netflix," 22 Apr. 2020 Recent Examples on the Web: Noun Cooler conditions and a thicker marine layer will begin to return Friday and over the weekend into early next week, the weather service said. Los Angeles Times, "Brush fire erupts in exclusive Hollister Ranch amid strong winds and sweltering temperatures," 7 May 2020 Sounds like a good-news story in every way, until the humpback whales Wyland painted became as endangered as the massive marine mammals memorialized by the mural once were. Michael Granberry, Dallas News, "Massive downtown mural resurfaces from beneath ads that covered it for years," 23 Apr. 2020 Chemicals in crude oil may affect fish and other marine creatures directly, through their toxicity, or indirectly by harming their food or habitat, and the effects can be immediate or long-term. F. Joel Fodrie, The Conversation, "Coastal fish populations didn’t crash after the Deepwater Horizon spill – why not?," 16 Apr. 2020 Once on in the lab, researchers dissected the wood to discover what marine species were living inside. Andrea Romano, Travel + Leisure, "Scientists Found a 60,000-year-old Forest Underwater — and It Could Improve People's Lives in the Long Run," 11 Apr. 2020 In fact, the amount and diversity of marine fossils found in the cave exceeds other more recent sites. Ashley Strickland, CNN, "European Neanderthals ate fresh seafood, which may have given their brains a boost," 26 Mar. 2020 These are concentrated clusters at popular dive and snorkeling locations like our national marine sanctuaries. John Haughey, Washington Examiner, "Florida ban on sunscreen bans headed for DeSantis’ desk," 11 Mar. 2020 Rothy's makeup bag is available in three sizes and here's the kicker: It's made from 100 percent recycled marine plastic. Kaleigh Fasanella, Allure, "Rothy's, Meghan Markle's Go-To Sustainable Shoe Brand, Just Launched Makeup Bags," 3 Mar. 2020 The top marine aquaculture species were oysters, clams and salmon. Anchorage Daily News, "Dutch Harbor stays on top among U.S. fishing ports," 25 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'marine.' 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 marine


15th century, in the meaning defined at sense 1a


1669, in the meaning defined at sense 1a

History and Etymology for marine

Adjective and Noun

Middle English, from Latin marinus, from mare sea; akin to Old English mere sea, pool, Old High German meri sea, Old Church Slavonic morje

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Time Traveler for marine

Time Traveler

The first known use of marine was in the 15th century

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Statistics for marine

Last Updated

27 May 2020

Cite this Entry

“Marine.” Dictionary, Merriam-Webster, Accessed 29 May. 2020.

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More Definitions for marine


How to pronounce marine (audio)

English Language Learners Definition of marine

 (Entry 1 of 2)

: of or relating to the sea or the plants and animals that live in the sea
: of or relating to sailing on the sea or doing business (such as trading) by sea



English Language Learners Definition of marine (Entry 2 of 2)

: a member of the U.S. Marine Corps or the British Royal Marines


ma·​rine | \ mə-ˈrēn How to pronounce marine (audio) \

Kids Definition of marine

 (Entry 1 of 2)

1 : of or relating to the sea marine animals
2 : of or relating to the navigation of the sea : nautical marine charts
3 : of or relating to soldiers in the United States Marine Corps marine barracks



Kids Definition of marine (Entry 2 of 2)

1 : a soldier of the United States Marine Corps
2 : the ships of a country

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