A submarine boat; esp., Nav., a submarine torpedo boat; -- called specif. submergible submarine when capable of operating at various depths and of traveling considerable distances under water, and submersible submarine when capable of being only partly submerged, i.e., so that the conning tower, etc., is still above water. The latter type and most of the former type are submerged as desired by regulating the amount of water admitted to the ballast tanks and sink on an even keel; some of the former type effect submersion while under way by means of horizontal rudders, in some cases also with admission of water to the ballast tanks.
Being, acting, or growing, under water in the sea; as, submarine navigators; submarine plants.
If you're trying to get someone who's sick with a fever off of a submarine and it's cold and raining outside, the only way in and out of a submarine, generally, is through a fairly narrow hatch. Laurel Clark
The question of whether a computer can think is no more interesting than the question of whether a submarine can swim. Edsger Dijkstra
For me, a good thriller must teach me something about the real world. Thrillers like 'Coma,' 'The Hunt for Red October' and 'The Firm' all captivated me by providing glimpses into realms about which I knew very little - medical science, submarine technology and the law. Dan Brown
I must confess that my imagination refuses to see any sort of submarine doing anything but suffocating its crew and floundering at sea. H. G. Wells
When you're on a submarine you're usually underwater for months at a time, and you don't get to Skype or make phone calls. When you get messages, they're maybe two sentences. They're very short. Jessy Schram