The act or process by which something is undermined.
But undermining forces were already at work: the faults inherent in his unwieldy achievement.
Anxious as Henry was to avoid being involved in foreign wars, it was not many years before he was committed to a war with France, partly by his desire of an alliance with Spain, and partly by the indignation of his own subjects at the way in which the French were undermining the independence of Brittany.
Along the whole of the Samara bend the Volga is accompanied on its right bank by high cliffs, which it is constantly undermining, while broad lowland areas stretch along the left or eastern bank, and are intersected by several old beds of the Volga.
He was the first sultan to share personally in the proceeds of the corruption which was undermining the state, realizing especially large sums by the sale of offices.
Mines may become flooded by the inrush of surface waters in times of great rainfall or sudden floods, or by the undermining of surface waters.