| submarine |  | |
| 1. adj. Undersea. | |
| 2. adj. Hidden or undisclosed. | |
| a submarine patent | |
| 3. adj. (baseball) Of a pitch, thrown with the hand lower than the elbow. | |
| 4. n. A boat that can go underwater. | |
| 5. n. A kind of sandwich made in a long loaf of bread. | |
| 6. n. (baseball) Pitch delivered with an underhand motion. | |
| 7. n. Any submarine plant or animal. | |
| 8. n. (informal) A stowaway on a seagoing vessel. | |
| 9. v. (intransitive) To operate or serve on a submarine. | |
| 10. v. To torpedo; to destroy with a sudden sneak attack. | |
| 11. v. (intransitive, sometimes figurative) To sink or submerge oneself. | |
