ma·​rine | \ mə-ˈrēn \

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

maritime, oceanic, pelagic

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Examples of marine in a Sentence


marine animals such as dolphins and whales he loves collecting little marine creatures while at the beach


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

The interior features all of Outside Van’s standard amenities (a marine grade floor, custom wheel tub boxes, full insulation, wall and ceiling paneling, and LED lighting), and two people can sleep on the three-panel bed. Megan Barber, Curbed, "Camper van with skylights lives large in 100 square feet," 17 Dec. 2018 Moments of scientific discovery are not usually caught on film, but this clip of marine biologists finding a gulper eel in the Pacific Ocean is a rare and delightful exception. James Vincent, The Verge, "The most heartwarming video you’ll see today is of scientists cooing over this rare eel," 21 Sep. 2018 Lake County marine biologists came to the scene to search for the alligator’s body. Monique Valdes, ajc, "Florida teen trapped in tree after being chased by gator, deputies say," 3 July 2018 But conservation efforts are getting underway while scientists are still searching for basic information about Arctic wildlife, said Donna Hauser, the study’s lead author and a marine biologist at the University of Washington’s Polar Science Center. Adam Aton, Scientific American, "Ships Threaten Arctic Marine Mammals," 3 July 2018 The tipping point for many was a 2015 YouTube video of marine biologists in Costa Rica removing a plastic straw that had become lodged up a sea turtle’s nose. Robert Channick,, "From a South Side plastics factory to McDonald's HQ, Chicago is on the front lines of anti-straw push," 11 June 2018 According to the foundation’s website, most of the clock will be made with marine-grade stainless steel and some key parts with stone and hi-tech ceramics, which should outlast most metals. Julissa Treviño, Smithsonian, "Construction Underway on Clock That Will Keep Time for 10,000 Years," 27 Feb. 2018 That, in combination with components made with marine grade 316 stainless steel and engineering tolerances in fractions of an inch to allow for corrosion and other unavoidable weathering over the years. Eric Limer, Popular Mechanics, "Watch a 10,000-Year Clock Being Installed in a Mountain," 20 Feb. 2018 After dinner in France, Immelt stopped in Helsinki to consider another target, Wartsila, a Finnish builder of marine engines, oil-and-gas equipment and power plants. Thomas Gryta And Ted Mann, WSJ, "GE Powered the American Century—Then It Burned Out," 14 Dec. 2018

Recent Examples on the Web: Noun

The brave marine pulled through and met his goal with flying colors — well, blue colors, that is. Sarah Schreiber, Good Housekeeping, "People Are Loving This Bride Who Made Her Veteran Uncle Her "Something Blue"," 25 May 2017 This change in climate has been blamed for the simultaneous extinctions of a number of marine megafauna species, including the largest and most powerful predator to have ever lived—the megalodon. Jill Kiedaisch, Popular Mechanics, "Exploding Stars Might Have Brought an End to the Prehistoric Megalodon," 14 Dec. 2018 His father, who sold marine engines, moved the family to Scarsdale, N.Y., and Gerry split his childhood between that posh suburb and a farm his father bought in Hunterdon County, N.J. James R. Hagerty, WSJ, "H.F. Lenfest Made Fortune on Cable, Then Focused on Giving Most of It Away," 10 Aug. 2018 Next comes a hefty layer of hyaluronic acid serum, like Dr. Nigma's elixir, packed with marine peptides to plump skin from the inside out. Jenna Rennert, Vogue, "7 Skincare Cures for Erasing All Signs of a Holiday Hangover," 26 Nov. 2018 There’s an in-house marine biologist tasked with growing a coral nursery, and the property is committed to funding parts of Komodo National Park (a dollar from every room booked goes to the park). Sebastian Modak, Condé Nast Traveler, "Why Now Is the Time to Visit Flores, Indonesia," 16 Nov. 2018 In this new era, humans are the primary change agents, rapidly degrading what makes the planet habitable, intensifying greenhouse gas concentration, and damaging the health of marine ecosystems. Abigail Higgins, Vox, "10 ways the world is most likely to end, explained by scientists," 18 Oct. 2018 The attack at the heart of the case was a suicide truck bombing of a U.S. marine barracks in Beirut in October 1983 that killed 241 military personnel and wounded many more. Mike Corder, The Seattle Times, "US urges UN court to toss out Iranian case on frozen assets," 8 Oct. 2018 McCain's son Jimmy (pictured above left), 30, is a marine. Elizabeth Angell, Town & Country, "John McCain’s Son Jimmy Just Read His Father's Favorite Poem at the Late Senator’s Funeral," 1 Sep. 2018

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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Statistics for marine

Last Updated

8 Jan 2019

Look-up Popularity

Time Traveler for marine

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

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More Definitions for marine



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 \

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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More from Merriam-Webster on marine

Rhyming Dictionary: Words that rhyme with marine

Thesaurus: All synonyms and antonyms for marine

Spanish Central: Translation of marine

Nglish: Translation of marine for Spanish Speakers

Britannica English: Translation of marine for Arabic Speakers Encyclopedia article about marine

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marked by shyness and lack of polish

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