- a military mine for intercepting or destroying an enemy mine
Origin of countermineMiddle English countremine: see counter- and mine
transitive verb-·mined·, -·min·ing
- to intercept (an enemy mine) with a countermine
verbcoun·ter·mined, coun·ter·min·ing, coun·ter·mines
- To frustrate or defeat by secret and opposite measures.
- To make or use a countermine against.
- A tunnel dug to intercept and destroy an enemy's mine.
- A plot to frustrate or defeat an attack.
(third-person singular simple present countermines, present participle countermining, simple past and past participle countermined)
From counter- + mine.