What is the meaning of submarine?

noun

• A submersible warship usually armed with torpedoes.
  • synonyms: pigboat, sub, U-boat
• A large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States.
  • synonyms: bomber, grinder, hero, hero sandwich, hoagie, hoagy, Cuban sandwich, Italian sandwich, poor boy, sub, submarine sandwich, torpedo, wedge, zep

verb

• Move forward or under in a sliding motion.
  • usage: "The child was injured when he submarined under the safety belt of the car"
• Throw with an underhand motion.
• Bring down with a blow to the legs.
• Control a submarine.
• Attack by submarine.
  • usage: "The Germans submarined the Allies"

adjective

• Beneath the surface of the sea.
  • synonyms: undersea