Etive, a sea-loch in Argyllshire, Scotland, is an inland extension of the Firth of Lorne, about 20 m. in length, and varying in breadth from 2 to ¼ m.; the mountain scenery along the shores grandly picturesque; the river which bears the same name rises in Rannoch Moor, and joins the loch after a SW. course of 15 m.; both loch and river afford salmon-fishing.