verb (used with object), coun·ter·mined, coun·ter·min·ing.
verb (used without object), coun·ter·mined, coun·ter·min·ing.
Examples from the Web for countermine
Before sunrise the baron commenced a countermine at the point indicated by the deserter, inside the bailey wall.Annals of a Fortress|E. Viollet-le-Duc
He knew you, madam, and was resolved to countermine you in all your plots.Dryden's Works Vol. 3 (of 18)|John Dryden
He was hastening to Court, to countermine his underminers, from Bath, where he had been taking the waters.Sir Walter Ralegh|William Stebbing
The besieged had not realized the situation in time to drive a countermine or to erect a second wall inside the danger point.Life on a Mediaeval Barony|William Stearns Davis
Keep a good lookout for the countermine which is now working against the good advice of his Majesty for mutual toleration.The Life of John of Barneveld, 1609-15, Volume I.|John Lothrop Motley