Definition of seaway in US English:



  • 1An inland waterway capable of accommodating seagoing ships.

    • ‘The St Lawrence seaway, one of the world's busiest shipping lanes after the English Channel, exits around the northern tip of Nova Scotia.’
    • ‘After 1903 and improvements to the St. Lawrence waterway, larger ships or ‘canalers’ could navigate the seaway.’
    • ‘Canada is every bit as vulnerable, experts say, at its ports, docks, canals, lakes, and seaways.’
    • ‘We put the boat in at Labrador and headed off around Wave Break Island to the actual seaway.’
    • ‘Every battle ever fought there was fought over control of the seaway.’
    1. 1.1the Seaway
    2. 1.2 A natural channel connecting two areas of sea.
      • ‘The earlier occurrences in North Carolina suggest that the genus dispersed westward through the Central American seaway.’
      • ‘This scenario maximizes the depth and linkage of the basins forming the seaway.’
      • ‘In the annual cycle experiments, however, low winter insolation causes the seaways to freeze.’
      • ‘Cook charted the coasts and seaways of Canada, the St Lawrence Channel and the coasts of Nova Scotia and Newfoundland.’
      • ‘Continental displacements led to changes in the configurations of the oceans, and seaways opened and closed.’
    3. 1.3 A route across the sea used by ships.
      • ‘Columbus set out to find a new seaway to India and he ended up discovering America.’
      • ‘Unfortunately we need two miles of seaway to stop our ship and our rudder is jammed, hence we cannot change course.’
      • ‘This was one of the most ambitious threats from Norway and was aiming to establish maritime control over the western seaways.’
      • ‘In a dangerous combat situation, or even a crowded seaway, this can provide a huge advantage.’
  • 2in singular A stretch of water in which a sea is running.

    ‘with the engine mounted amidship, the boat pitches less in a seaway’
    • ‘The dog boats were also small in comparison to their opponents but rode better in a seaway.’
    • ‘In general, the safety of a ship in a seaway is related to three major safety parameters - structural safety, overturning stability, and seakeeping quality.’
    • ‘This number results from a formula that is intended to represent a boat's expected motion in a seaway.’
    • ‘The calculated ship responses in irregular seaways were arranged for each sea state (that is, wave height).’