seawayEtymologyFrom Middle English seewey, from Old English sǣweġ (“a seaway, a path through the sea”), equivalent to sea + way. Compare Saterland Frisian Seegong (“seaway, swell”), German Seegang (“seaway, swell”).seaway means A lane or route at sea that is regularly used by ships; a sea lane or trade route. Lexicurio rates it Rare gem — a strength score of 79 out of 100.nounA lane or route at sea that is regularly used by ships; a sea lane or trade route.An inland waterway used by seagoing shipping.“The coracle […] was a very safe boat for a person of my height and weight, both buoyant and clever in a seaway; but she was the most cross-grained, lop-sided craft to manage.”The headway of a vessel.