Part of speech: adjective

Existing, done, or operating beneath the surface of the sea, as a submarine boat.

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Usage examples "submarine":

  1. Strange to say what we had been watching was the last of the " Triumph" which had been torpedoed by the submarine that caused the excitement the other day. - "The Incomparable 29th and the "River Clyde"", George Davidson.
  2. The dark waters harbored no submarine save a great turtle who slipped from a log and submerged, sending a mass of ripples around a much- frightened blue heron. - "See America First", Orville O. Hiestand.
  3. Germany was split wide open by the submarine issue. - "Germany, The Next Republic?", Carl W. Ackerman.