something that functions or operates underwater; specifically : a naval vessel designed to operate underwater
submarine
noun(sub-ma-rine)
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
submarine
verb(sub-ma-rine)
to attack by or as if by a submarine : attack from beneath
submarine
verb(sub-ma-rine)
to dive or slide under something
submarine
adjective(sub-ma-rine)
directed against submarines : designed or intended to destroy submarines