The cardinal point on the mariner's compass 180\u00b0 clockwise from due north and directly opposite north. The direction along a meridian 90\u00b0 clockwise from east; the direction to the right of sunrise. An area or region lying in the south. The southern part of the earth. The southern part of a region or country. The southern part of the United States, especially the states that fought for the Confederacy in the Civil War. To, toward, of, facing, or in the south. Originating in or coming from the south: a hot south wind. In, from, or toward the south. Slang Into a worse or inferior position, as of decreased value: a stock that went south shortly after he bought it.