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

Keep scrolling for more

Synonyms for marine

Synonyms: Adjective

maritime, oceanic, pelagic

Visit the Thesaurus for More 

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
See More

Recent Examples on the Web: Adjective

The fossils were discovered in 2014 at the Fezouata Formation, near the Sahara Desert, a region known for its records of ancient marine life. David Grossman, Popular Mechanics, "A 150-Year Old Weird Ancient Animal Mystery, Solved," 22 Feb. 2019 In recent years, the state’s coasts and waterways have been besieged by outbreaks of blue-green algae and red tide that have killed marine life and driven away tourists. Arian Campo-flores, WSJ, "New Florida Governor Moves Quickly With Supreme Court Pick, Environmental Plan," 10 Jan. 2019 Aside from the hotel opening, Eilat is home to one of the most stunning arrays of marine life on the planet. Carrie Goldberg, Harper's BAZAAR, "The 19 Best Places to Travel in 2019," 10 Jan. 2019 Granted, numerous factors can impact marine life beyond sunscreen, such as climate change. Kari Molvar, Vogue, "Is Your Sunscreen Bad for the Planet? Here’s How to Choose an Ocean-Safe Formula," 14 Aug. 2018 Based on what is known, scientists project that more than 90 percent of the world’s reefs, which sustain 25 percent of marine life, will be extinct by 2050. Bill Gourgey, WIRED, "How Artificial Intelligence Could Prevent Natural Disasters," 10 July 2018 Beach officials warned visitors by placing purple flags in the sand, signaling that dangerous marine life may be lurking in the water. Amanda Macmillan,, "What Are Sea Lice, and How Do You Avoid Their Red, Itchy Rash?," 27 June 2018 Plastic bits end up inside marine life and in those of us who eat fish, and plastic bags wash up on beaches the way seaweed used to. Aaron Gilbreath, Longreads, "Seeing the Modern World In the Disposable Plastic Straw," 26 June 2018 Firming + Illuminating Mask with marine algae, SLAP IT! Retexturizing + Detoxifying Mask with caffeine, and SQUEEZE IT! Brightening + Rejuvenating Mask with citrus. Amanda Mitchell, Marie Claire, "I Tried Butt Masks, and My Booty May Never Be The Same," 22 Feb. 2019

Recent Examples on the Web: Noun

The pipeline would connect to a new marine terminal that Houston's Buckeye Partners, Phillips and Andeavor are building, with an initial storage capacity of 3.4 million barrels. Collin Eaton, Houston Chronicle, "Phillips 66 Partners moving ahead with West Texas pipeline system," 25 Apr. 2018 One marine was killed and twelve others were wounded, according to the Associated Press. Caleb Downs, San Antonio Express-News, "Mexican governor warns citizens not to travel to U.S. via Reynosa-McAllen bridge," 29 Mar. 2018 Previous studies on hawksbill turtles already have helped Omani and Emirati officials begin rethinking boundaries of some marine protected areas. National Geographic, "Searching for Elusive Green Sea Turtles in the Persian Gulf," 16 June 2018 The ship, which cost $1.6 billion, is designed to accommodate upwards of 800 marines along with armored vehicles, tanks and other equipment. Beth Nakamura,, "Sneak peek inside the USS Portland, set to be commissioned Saturday," 19 Apr. 2018 In two separate exchanges of gunfire, all seven of the cars’ occupants were shot dead by marines. Time, "A Police Shootout in Troubled Southern Mexico Has Left 11 People Dead," 8 Jan. 2018 The office said federal and state agents and marines then launched a hunt for Orea, including support from aircraft. Fox News, "2 Mexican cops killed trying to detain 2012 NY slay suspect," 27 Sep. 2018 Mexican marines are currently protecting refineries, where tanker trucks are filling up. Robbie Whelan, WSJ, "Fuel Crisis Hits Mexico After Pipelines Are Closed," 9 Jan. 2019 On Friday, a platoon of about 50 female marines began training side-by-side with the men at the traditionally all-male battalion at a facility in Parris Island, South Carolina. Samantha Leach, Glamour, "An All-Female Marine Platoon Will Finally Train Alongside Men at Boot Camp," 5 Jan. 2019

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.

See More

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

Keep scrolling for more

Learn More about marine

Statistics for marine

Last Updated

19 Mar 2019

Look-up Popularity

Time Traveler for marine

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

See more words from the same century

Keep scrolling for more

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 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

Keep scrolling for more

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

Comments on marine

What made you want to look up marine? Please tell us where you read or heard it (including the quote, if possible).


a flaw that causes the downfall of a hero

Get Word of the Day daily email!

Test Your Vocabulary

A Green Quiz

  • shamrock
  • What is the best definition of green-eyed monster?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!