Wiktionary
n. The compass point halfway between southwest and south-southwest, specifically 213.75°, abbreviated as SWbS.
WordNet
n. the compass point that is one point south of southwest [syn: SWbS]
Usage examples of "southwest by south".
She sailed in soundings, ten fathoms of water, for almost a full day until, setting a course southwest by south, she left the Dutch coast at dawn on the second day and, putting on more sail, holding a close wind, turned her bows towards England.
Joanna Taubman set a course away from population centers and worked Southwest by South.
The vessel was more than a hundred leagues southwest by south of Taloazin.
All those who had been poised to act, waiting for this signal, instantly cast off moorings, raced aloft, and watching Surprise with the closest attention, followed her movements with such exemplary success that the whole squadron of four ship-sloops and one frigate moved steadily across the harbour in an exactly straight, exactly spaced line, and, amid the cheers and applause of the multitude, into the open sea, where, again following the example of Surprise, they all steered southwest by south, to allow for the heave of the moderately powerful swell and making tide.