What is "countermines"

Usage examples of "countermines".

And being no stranger to the art of war, I gave him a description of cannons, culverins, muskets, carabines, pistols, bullets, powder, swords, bayonets, battles, sieges, retreats, attacks, undermines, countermines, bombardments, sea fights, ships sunk with a thousand men, twenty thousand killed on each side, dying groans, limbs flying in the air, smoke, noise, confusion, trampling to death under horses' feet, flight, pursuit, victory.

And being no stranger to the art of war, I gave him a description of cannons, culverins, muskets, carabines, pistols, bullets, powder, swords, bayonets, battles, sieges, retreats, attacks, undermines, countermines, bombardments, sea-fights.

The Department of Indigenous Affairs had fought off its rivals and secured its borders, but now there were bitter skirmishes in the corridors, and mines and countermines were being dug through the fabric of the Palace as the warring departments tried to break out behind each other's lines.

If we can carry it the city must fall, but they have run countermines all round it, and the walls are so enormously thick that it would be an immense labour to breach it with artillery.

Over the next weeks other parts of the wall were blown up, while from the ramparts the defenders fired back in vain, for now the enemy moved underground, and the countermines were unable to dislodge him.