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
Susan Selasky, Detroit Free Press, 16 Oct. 2024
This eruption even gave its name to the style of shallow, submarine basaltic eruptions: Surtseyan.
—Erik Klemetti, Discover Magazine, 11 Nov. 2023
David Faris, Newsweek, 4 Nov. 2024
Long ago, an unlucky arthropod was buried alive in a submarine landslide.
—Margherita Bassi, Smithsonian Magazine, 31 Oct. 2024
Dominique Fluker, Essence, 11 Oct. 2024
Ghosting is a clean break to the relationship, while submarining is a lingering, unhealthy, and toxic connection that just can’t go away.
—Dominique Fluker, Essence, 11 Oct. 2024
See all Example Sentences for submarine 
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Adjective
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
This eruption even gave its name to the style of shallow, submarine basaltic eruptions: Surtseyan.
—Erik Klemetti, Discover Magazine, 11 Nov. 2023
Noun
The Tomahawk is a long-range precision weapon used by the U.S. military's surface ships and submarines.
—David Faris, Newsweek, 4 Nov. 2024
Long ago, an unlucky arthropod was buried alive in a submarine landslide.
—Margherita Bassi, Smithsonian Magazine, 31 Oct. 2024
Verb
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
Ghosting is a clean break to the relationship, while submarining is a lingering, unhealthy, and toxic connection that just can’t go 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 23 Nov. 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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