sub·​ma·​rine | \ ˈsəb-mə-ˌrēn How to pronounce submarine (audio) , ˌsəb-mə-ˈrēn \

Definition of submarine

 (Entry 1 of 3)

: underwater especially : undersea submarine plants submarine minerals



Definition of submarine (Entry 2 of 3)

1 : something that functions or operates underwater specifically : a naval vessel designed to operate underwater
2 : a large sandwich on a long split roll with any of a variety of fillings (such as meatballs or cold cuts, cheese, lettuce, and tomato)

called also grinder, hero, hoagie, Italian sandwich, po'boy, sub, torpedo


submarined; submarining

Definition of submarine (Entry 3 of 3)

transitive verb

: to attack by or as if by a submarine : attack from beneath

intransitive verb

: to dive or slide under something

Synonyms for submarine

Synonyms: Adjective

Synonyms: Noun

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Examples of submarine in a Sentence

Adjective the submarine fossils that are to be found in coral reefs Noun always orders a roast beef submarine with the works
Recent Examples on the Web: Adjective The carrier strike group will join ships in the Atlantic Ocean from countries that include France, Germany and Sweden for various exercises, including anti-submarine warfare. Ben Finley, ajc, 29 Sep. 2022 Naval Air Station Jacksonville, an air and industrial base supporting US and allied forces in anti-submarine warfare and aviator training, is the largest Navy base in the Southeast region, according to the Navy website. Melissa Alonso, CNN, 15 Sep. 2022 The exercises would include anti-submarine drills, which appear to target U.S. support for Taiwan should China invade the island, according to social media posts from the People’s Liberation Army. Landon Mion, Fox News, 8 Aug. 2022 The relevant, realistic training program includes gunnery, missile, anti-submarine and air defense exercises, as well as amphibious, counter-piracy, mine clearance operations, explosive ordnance disposal and diving and salvage operations. Hartford Courant, 25 July 2022 China has invested heavily in its navy, outnumbering the U.S. in ships, and has made advances in anti-submarine warfare. Charles Hutzler, WSJ, 4 Aug. 2022 Air Force planes were a mix of fighter jets, early warning and control aircraft, electronic warfare aircraft, anti-submarine aircraft, electronic intelligence aircraft, and aerial refueling aircraft. Brad Lendon And Wayne Chang, CNN, 22 June 2022 The perfection of the bathythermograph as an anti-submarine warfare tool had been a high priority at WHOI for years before the war. Catherine Musemeche, Smithsonian Magazine, 7 July 2022 Fincantieri Marinette Marine will design and build the 7,300-ton frigate that’s expected to be a key part of the Navy’s anti-submarine warfare and one of 10 frigates built in Marinette. Rick Barrett, Journal Sentinel, 18 June 2022 Recent Examples on the Web: Noun Being on the tour bus together is like being on a submarine. Vogue, 27 May 2022 But what passes for a normal day on this submarine is far from it. ABC News, 22 May 2022 Barron became one of the first women ever to serve on a US Navy submarine back in 2010. Jackie Wattles, CNN, 5 May 2022 The entrance hatch is also reportedly the largest to ever be incorporated on a submarine of this size and can be paired with an optional elevator for easy access inside. Rachel Cormack, Robb Report, 22 Apr. 2022 While on a nuclear submarine participating in a military exercise, Homer unintentionally fires the sub captain out of the vessel into Russian waters. Ryan Parker, The Hollywood Reporter, 24 Feb. 2022 His submarine tumbled flailing into the water, its gyrocompass already broken. Chieko Tsuneoka, WSJ, 7 Dec. 2021 He is joined by another rookie, Kayla Barron, a Navy lieutenant commander who served on a nuclear submarine, and Tom Marshburn, a physician who has flown to space twice before, once on the space shuttle Endeavour and once on the Russia Soyuz. Washington Post, 10 Nov. 2021 And then, days later, a Navy crew drove their front-line submarine into the ground. Craig Hooper, Forbes, 8 Nov. 2021 Recent Examples on the Web: Verb There was a lot of talk last week about whether Michigan might submarine Ohio State, which badly needs to play that rivalry game to qualify for the Big Ten championship game. oregonlive, 6 Dec. 2020 Irving’s mood swings have the potential to submarine a good thing next season in Brooklyn, if things don’t go precisely to plan. Jeff Mcdonald,, 25 Aug. 2020 An ankle injury took him out of the rotation for the crucial and crippling January that submarined his junior season. Zach Osterman, Indianapolis Star, 24 Mar. 2020 Or whether the Coronavirus is an instrument designed by the radical left to submarine a presidential re-election campaign? Shawn Windsor, Detroit Free Press, 29 Feb. 2020 Miller’s second season in charge was submarined by health issues across his roster. Zach Osterman, Indianapolis Star, 12 Dec. 2019 Against Texas Tech, the lack of depth finally submarined them. Shawn Windsor, Detroit Free Press, 23 Oct. 2019 The Hawkeyes’ offense is lagging way behind though, and that inconsistency is threatening to submarine their season. Luke Meredith, San Diego Union-Tribune, 19 Oct. 2019 But what about the bullpen that came perilously close to submarining their World Series run last season? Jon Tayler,, 19 June 2018 See More

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

First Known Use of submarine


1648, in the meaning defined above


1703, in the meaning defined at sense 1


1905, in the meaning defined at transitive sense

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Time Traveler for submarine

Time Traveler

The first known use of submarine was in 1648

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Dictionary Entries Near submarine



submarine bell

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Statistics for submarine

Last Updated

2 Oct 2022

Cite this Entry

“Submarine.” Dictionary, Merriam-Webster, Accessed 2 Oct. 2022.

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More Definitions for submarine


sub·​ma·​rine | \ ˈsəb-mə-ˌrēn How to pronounce submarine (audio) , ˌsəb-mə-ˈrēn \

Kids Definition of submarine

: a naval ship designed to operate underwater

More from Merriam-Webster on submarine

Nglish: Translation of submarine for Spanish Speakers

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


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