Seaway may refer to:
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Seaway (band), a pop punk band from Canada.
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Sound (geography)
In geography, a sound is a smaller body of water typically connected to a larger sea or ocean. There is little consistency in the use of "sound" in English-language place names. It can refer to an inlet, deeper than a bight and wider than ...
, a sea or ocean inlet larger than a bay, deeper than a bight, and wider than a fjord, or a narrow sea or ocean channel between two bodies of land
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Sea lane or shipping lane, a regularly-used route for vessels on oceans and large lakes
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''Seaway'' (TV Series), Canadian drama series that aired on CBC Television 1965–1966
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