seaway

(-wā′)

noun

  1. a way or route by sea; sea as a means of travel
  2. a ship's headway
  3. a moderate to rough sea
  4. an inland waterway to the sea for ocean ships: St. Lawrence Seaway

See seaway in American Heritage Dictionary 4

noun
  1. A sea route.
  2. An inland waterway for ocean shipping.
  3. The headway of a ship.
  4. A rough sea.

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