[ noun koun-ter-mahyn; verb koun-ter-mahyn, koun-ter-mahyn ]
See synonyms for countermine on
  1. Military. a mine intended to intercept or destroy an enemy mine.

  2. a counterplot.

verb (used with object),coun·ter·mined, coun·ter·min·ing.
  1. to oppose by a countermine.

verb (used without object),coun·ter·mined, coun·ter·min·ing.
  1. to make a countermine.

  2. Military. to intercept or destroy enemy mines.

Origin of countermine

late Middle English word dating back to 1425–75; see origin at counter-, mine2

Words Nearby countermine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use countermine in a sentence

  • Finding plenty of miners among the Cornishmen of the 32d, he sunk a countermine for each mine burrowed by the enemy.

    The Red Year | Louis Tracy
  • So Paul concealed his plans from Madame Astier, in entire ignorance that she was running a countermine in the same line as his.

    The Immortal | Alphonse Daudet
  • He knew you, madam, and was resolved to countermine you in all your plots.

  • In that way the lonely hermit put his foot down and began a countermine, working as silently as possible.

    The Book of the Bush | George Dunderdale
  • You cannot countermine the fortifications of Flore and Maxence without getting a priest to sap them.

    The Two Brothers | Honore de Balzac

British Dictionary definitions for countermine


  1. military a tunnel dug to defeat similar activities by an enemy

  2. a plot to frustrate another plot

  1. to frustrate by countermeasures

  2. military to take measures to defeat the underground operations of (an enemy)

  1. military to destroy enemy mines in (an area) with mines of one's own

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012