Definition of submarine

Definition of submarine
  1. submarine Adjective Under water.
  2. submarine Adjective Of something hidden or undisclosed, e.g. "submarine patent".
  3. submarine Noun A boat that can go underwater.
  4. submarine Noun A kind of sandwich made in a long loaf of bread.
  5. submarine Noun Pitch delivered with an underhand motion.
  6. submarine Verb To operate or serve on a submarine
  7. submarine Verb To torpedo; to destroy with a sudden sneak attack
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