• WordNet 3.6
    • v countermine destroy enemy mines with one's own mines "We countermined the banks of the river"
    • v countermine destroy property or hinder normal operations "The Resistance sabotaged railroad operations during the war"
    • n countermine (military) a tunnel dug to defeat similar activities by the enemy
    • ***
Webster's Revised Unabridged Dictionary
    • Countermine A stratagem or plot by which another sratagem or project is defeated. "Thinking himself contemned, knowing no countermine against contempt but terror."
    • Countermine (Mil) An underground gallery excavated to intercept and destroy the mining of an enemy.
    • Countermine To frustrate or counteract by secret measures.
    • v. i Countermine To make a countermine or counterplot; to plot secretly. "'Tis hard for man to countermine with God."
    • Countermine (Mil) To oppose by means of a countermine; to intercept with a countermine.
    • ***
Century Dictionary and Cyclopedia
    • n countermine Milit., a mine driven from defense-works by the besieged, counter to a mine driven toward the defense-works by besiegers, the object being to meet and destroy the works of the latter party. Sometimes the two parties carry their opposing galleries so far as to meet and fight in the subterranean passages.
    • n countermine Hence A secret plan designed to frustrate the plans of an opponent; any antagonistic action or plan.
    • countermine To mine counter or in opposition to; resist by means of a countermine, as a besieging enemy or his works.
    • countermine To counterwork; frustrate by secret and opposite measures.
    • countermine To make a countermine; counterplot; work against one secretly.
    • n countermine A mine or torpedo placed and exploded in a harbor entrance by an attacking navy to destroy the mines or torpedoes which guard the entrance.
    • ***
Chambers's Twentieth Century Dictionary
    • v.t Countermine to make a mine in opposition to: to oppose by means of a countermine:
    • v.t Countermine (fig.) to frustrate by secret working:—pr.p. countermin′ing; pa.p. countermined′
    • ***


Webster's Revised Unabridged Dictionary
Counter-, + mine, underground gallery: cf. F. contermine,
Chambers's Twentieth Century Dictionary
Fr.,—L. contra, against.


In literature:

When your enemies are undermining you, you must countermine or you'll be blown up.
"Phineas Redux" by Anthony Trollope
After this, twelve small charges of gun-cotton were sunk in various directions, each representing a countermine of 500 pounds.
"In the Track of the Troops" by R.M. Ballantyne
They mine and countermine, until it isn't safe to predict who is immune and who isn't.
"The Brentons" by Anna Chapin Ray
Now, here was a nice plot to face, and countermine!
"The Castaways" by Harry Collingwood
Only a little art-military trick, captain, only countermined, or so.
"The Comedies of William Congreve Volume 1 [of 2]" by William Congreve
The deep mines of sin and of alienation are all undermined and countermined by His love.
"Expositions of Holy Scripture" by Alexander Maclaren
The last few weeks were further enlivened by the knowledge that the Austrians were countermining against us.
"World's War Events, Vol. II" by Various
Countermining.= The enemy, when mining operations are suspected, runs out tunnels to meet the opposing mine.
"Manual of Military Training" by James A. Moss
How dextrous at mining and countermining!
"The Works of Aphra Behn" by Aphra Behn
Unable to detect and countermine me, it was natural that they should become impatient for my removal.
"The International Spy" by Allen Upward

In science:

Moreover, it is quite possible that, in any practical implementation, the advantages obtained by considering larger variational fields would be countermined by “noise” added by considering such order 2 (or larger) neigbourhoods of the given vertex.
Metric Ricci curvature for $PL$ manifolds