submarine /sʌb.məˈɹiːn/noun 4verb 4adjective 3forms 3phrases 1 noun4 •A boat that can go underwater.Me: *staring out window* looks like rain Submarine captain: what Me: but like more — 2020 •A pitch delivered with an underhand motion. •Any submarine plant or animal. •(informal) A stowaway on a seagoing vessel. verb4 •To operate or serve on a submarine. •To torpedo; to destroy with a sudden sneak attack.“We’re really at the point of chicken, where the Fed is trying to ward off inflation without submarining the economy.” — 2007 •To slide forwards underneath one's seat belt (during a crash or sudden stop).The seatback should always be up while driving so that the occupant doesn't submarine and potentially suffer severe internal injury. •(figurative) To sink or submerge oneself.The second their center snapped the ball, I submarined between the big guy's legs and tackled the halfback. — 2003 adjective3 •Being, relating to, or made for use underwater, especially beneath the sea.[…] a Chorus of Sea-nymphs, who[…] arrive, in a winged car, from the submarine palace of their father Oceanus. — 1908 •Of a pitch, thrown with the hand lower than the elbow. •Hidden or undisclosed. formssubmarined · submarining · submarines Phrases with submarine screen door on a submarineSomething that is useless or absurd.