1. The act of completely destroying or eliminating something, especially a population or species
The extermination of the pest population took several months.
O extermínio da população de pragas levou vários meses.
3. The act of killing all members of a group, often used in historical contexts of genocide
The Holocaust represented one of history's greatest atrocities of extermination.
O Holocausto representou um dos maiores atrocidades de extermínio da história.