Meallach Mhor is a Corbett of 769 m in Highland. It is the lowest of the ten register hills in the Glen Tromie to Glen Tilt region, where Beinn Dearg (Perth and Kinross, NN852778) is highest.
On the Corbetts height ladder it sits between Cul Beag (769.4 m) and Beinn a' Choin (768.7 m). Its nearest higher summit, Carn Dearg (792.1 m, 3.6 km east), is a listed top not profiled here. The highest point is recorded as blocky embedded boulder, not a cairn.