Meaning & use
submarine
A watercraft capable of operating underwater, used for military, scientific, or exploration purposes.
See it in a sentence
The submarine descended slowly to study creatures living near the ocean floor.
Naval submarines can remain submerged for months without surfacing.
A note on using this word
In American English, "submarine" also names a long sandwich, often shortened to "sub."
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
A long sandwich made with a length of bread split lengthwise and filled with meats, cheese, and vegetables.
We ordered two submarines and a bag of chips for lunch.
Make it your own
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