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
: to attack by or as if by a submarine : attack from beneath
: to dive or slide under something
Synonyms
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
Anna Halkidis, Parents, 6 Dec. 2024
Known as an innovator in the grocery business, Violante enhanced the experience at Holiday Market with an in-store bakery, freshly made submarine sandwiches, and beers from around the world, according to his family obituary.
—Susan Selasky, Detroit Free Press, 16 Oct. 2024
Michael Schneider, Variety, 23 Dec. 2024
Most unusual feature: Toy box that includes a U-boat Worx C-researcher submarine, two Falcon Tenders vessels, and an Ariel Nomad off-roader.
—Julia Zaltzman, Robb Report, 23 Dec. 2024
Troy Renck, The Denver Post, 15 Nov. 2024
Here are the main differences: Disappearance: Ghosting includes permanently cutting communication and the connection without an explanation, while submarining includes resurfacing after some time away.
—Dominique Fluker, Essence, 11 Oct. 2024
See all Example Sentences for submarine 
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Adjective
Deep Blue Sea—Learn about our oceans while on submarine Sea Lab Alpha with underwater explorers Marina and Reef.
—Anna Halkidis, Parents, 6 Dec. 2024
Known as an innovator in the grocery business, Violante enhanced the experience at Holiday Market with an in-store bakery, freshly made submarine sandwiches, and beers from around the world, according to his family obituary.
—Susan Selasky, Detroit Free Press, 16 Oct. 2024
Noun
The submarine that Frink and Ned take reminded me, of course, of the Ocean Gate submersible that broke apart while trying to visit the Titanic site.
—Michael Schneider, Variety, 23 Dec. 2024
Most unusual feature: Toy box that includes a U-boat Worx C-researcher submarine, two Falcon Tenders vessels, and an Ariel Nomad off-roader.
—Julia Zaltzman, Robb Report, 23 Dec. 2024
Verb
Nichushkin submarined the past two playoff runs, sent home during a first-round exit to Seattle in 2023 and banned hours before the puck dropped in Game 4 of the club’s second-round series against Dallas, leading to another premature elimination.
—Troy Renck, The Denver Post, 15 Nov. 2024
Here are the main differences: Disappearance: Ghosting includes permanently cutting communication and the connection without an explanation, while submarining includes resurfacing after some time away.
—Dominique Fluker, Essence, 11 Oct. 2024
See all Example Sentences for submarine
Articles Related to submarine
Dictionary Entries Near submarine
Cite this Entry
“Submarine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/submarine. Accessed 30 Dec. 2024.
Copy CitationKids Definition
submarine
1 of 2 adjective
sub·ma·rine
ˈsəb-mə-ˌrēn 
ˌsəb-mə-ˈrēn
submarine
2 of 2 noun1
: a naval vessel designed to operate underwater
2
: a large sandwich on a long split roll
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