The suburbs. The word is so translated in Ezekiel 45:2, and Ezekiel 48:17, and is used of the pasture-lands round the cities of refuge in Numbers 35:2. Here it is probably used in a wider sense for the coast-lands of Phoenicia, or even for the "waves" that washed the shores of the island-city.
The Vulgate gives classes (equivalent to "fleets").