submarine

(noun) a submersible warship usually armed with torpedoes. Synonyms: pigboat, sub, U-boat.

(noun) 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. Example: "The child was injured when he submarined under the safety belt of the car."

(verb) throw with an underhand motion.

(verb) bring down with a blow to the legs.

(verb) control a submarine.

(verb) attack by submarine. Example: "The germans submarined the allies."

(adj) beneath the surface of the sea. Synonyms: undersea.