activated mine

American  

noun

1. a mine with a secondary fuze designed to explode if the mine is tampered with.

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Example Sentences

“Leaving an activated mine like this is the same as releasing a monster,” said a 26-year-old military defector who worked as a combat engineer platoon commander in Myanmar.

From Seattle Times

Emergency responders were dispatched to the mine shortly before 8 p.m. local time on Wednesday and activated mine rescue operations, police said.

From Reuters