submarine
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adj. 1. happening, growing, done, or used below the surface of the sea; underwater.
Ex. submarine plants, a submarine mine. The continental terrace is one of the main subjects of investigation in submarine geology today (Scientific American).
submarine
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noun 1. a boat that can go under water. Submarines are used in warfare for attacking enemy ships with torpedoes and for launching guided missiles.
Ex. Nuclear-powered submarines have broken all earlier records for speed, endurance, and time submerg
submarine
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submarine, noun, verb, -rined,-rining,adjective.
submarine
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v.i. (Football.) to charge very low against and upset a lineman.
submarine
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v.t. to attack, damage, or sink by a submarine.