seaway seawater • seaweed · · · Info · Definitions · Synonyms · Characters · · seaway · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) a lane at sea that is a regularly used route for vessels. Synonyms: sea lane, ship route, trade route. · · Noun Definition 1 Synonyms · · · sea lane · · Synonym 1 ship route · · Synonym 2 trade route · · Synonym 3 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 s latin small letter s U+0073 w latin small letter w U+0077 y latin small letter y U+0079