What does "countermine" mean?

Countermine: A stratagem or plot by which another sratagem or project is defeated. Thinking himself contemned, knowing no countermine against contempt but terror. Sir P. Sidney.

Additional senses

  1. 2.(Mil.) To oppose by means or a countermine; to intercept with a countermine.
  2. 3.To frustrate or counteract by secret measures.
  3. 4.To make a countermine or counterplot; to plot secretly. 'Tis hard for man to countermine with God. Chapman.

Sources