人じん口こう爆ばく発はつMeaningsNoun1. population explosionKanji used人person口mouth爆explosion発let outComposed of人じん口こうpopulation; common talkNoun爆ばく発はつexplosion; detonation; blast; blowing up; eruption; outburst (of emotion); explosion (e.g. of anger); eruption (e.g. of discontent)NounExamples1人じん口こう爆ばく発はつは重じゅう大だいな問もん題だいである。The population explosion is a serious problem.