‘地雷’ (dì léi) literally means ‘earth thunder’ — ‘地’ (dì) means ‘earth’ or ‘ground’, and ‘雷’ (léi) means ‘thunder’ or ‘lightning’. Historically, the term evokes the sudden, explosive power of thunder striking the ground, making it a vivid metaphor for an explosive device buried underground to detonate upon contact or remotely. Today, it refers specifically to a concealed explosive weapon deployed on land for military defense or sabotage.

The word is used almost exclusively in serious, factual contexts — such as news reports about conflict zones, historical accounts of warfare, demining efforts, or safety education. It does not appear in casual or figurative speech (unlike English ‘landmine’ used metaphorically). While ‘雷’ alone can mean ‘bomb’ in slang (e.g., 网络雷区 ‘online minefield’), ‘地雷’ itself remains strictly literal and technical, never colloquial.