explosionとは何ですか? explosionとは何ですか? A release of mechanical, chemical, or nuclear energy in a sudden and often violent manner with the generation of high temperature and usually with the release of gases.A violent bursting as a result of internal pressure.The loud, sharp sound made as a result of either of these actions.A sudden, often vehement outburst: an explosion of rage. A sudden, great increase: a population explosion; the explosion of illegal drug use. Linguistics See plosion.