1 noun state of no longer being in existencedíothú masc c m uto be faced with extinctionbheith i mbaol do dhíothaithemass extinctionolldíothú2 noun state of no longer being used etcthe small shop is in danger of extinctiontá an baol ann go dtiocfaidh deireadh leis an siopa beagthe extinction of the language is nearis gearr uainn bás na teanga, tá an teanga sna críocha deireanacha