Bombogenesis - meteorology : rapid intensification of a storm caused by a sudden and significant drop in atmospheric pressure: the development or intensification of a bomb cyclone A cyclone is a low pressure system and a bombogenesis occurs when a storm intensifies, rapidly losing 24 millibars of pressure in 24 hours.— David Epstein First Known Use of bombogenesis 1989, in the meaning defined above History and Etymology for bombogenesis BOMB ENTRY 1 (in BOMB CYCLONE) + -O- + GENESIS