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.
I think a submarine is a very worthwhile weapon. I believe we can defend ourselves with submarines and all our troops back at home. This whole idea that we have to be in 130 countries and 900 bases... is an old-fashioned idea. Ron Paul
I've been writing since I was very young, even before I was a teenager. As far as I'm concerned, I am a writer - whether my writing's spoken or written in a blog, paper, book or printed on the side of a submarine. Dylan Moran