LADY, an isle, in the parish of Dhndonald, county of Ayr, 5 miles (S. S. W.) from Irvine, and 5 (N. W. by N.) from Ayr. This island is situated in the Firth of Clyde, about two miles and a half from Troon, the nearest point of the main land of the county. It is of an oval figure, and half a mile in length. On the eastern side is good anchorage ground; and two towers or pillars, which may be easily seen at a distance, have been erected on the north-west part of the isle, for the guidance of vessels in the Firth, the coast in this part being flat and dangerous.