ex·tinc·tion 
/ɪkˈstɪŋkʃən/ noun
plural ex·tinc·tions /ɪkˈstɪŋkʃən/ noun : the state or situation that results when something (such as a plant or animal species) has died out completely [noncount] ▪ the extinction of all life in the region ▪ Several bird species are threatened with extinction. = Several bird species are on the brink of extinction. ▪ the extinction of many old traditions [count] ▪ Mass extinctions of prehistoric animals are known to have occurred.
