Existing, relating to, or made for use beneath the sea. / Hidden or undisclosed. / (baseball) Of a pitch, thrown with the hand lower than the elbow.

A boat that can go underwater. / A kind of sandwich made in a long loaf of bread. / (baseball) Pitch delivered with an underhand motion. / Any submarine plant or animal.

(intransitive) To operate or serve on a submarine. / (transitive) To torpedo; to destroy with a sudden sneak attack. / (intransitive, sometimes figuratively) To sink or submerge oneself.

A member of the crew of a submarine. / (US, baseball) A pitcher that throws with an underhand motion.

plural of submarine

Third-person singular simple present indicative form of submarine

plural of submariner

simple past tense and past participle of submarine

present participle of submarine

The design, construction and use of submarines