A more thorough explanation:

In international criminal law, extermination refers to the mass murder of a specific group of people. This is considered a crime against humanity and is defined in Article 7 of the Rome Statute of the International Criminal Court (ICC).

Extermination can take many forms, including:

• The intentional killing of a large number of people
• The deliberate infliction of conditions that lead to the death of a group of people, such as depriving them of food and medicine

For example, during the Holocaust, the Nazi regime systematically exterminated six million Jews. This was done through a combination of mass shootings, gas chambers, and starvation in concentration camps. The Khmer Rouge regime in Cambodia also committed extermination by killing an estimated 1.7 million people through execution, forced labor, and starvation.

These examples illustrate how extermination involves the intentional and systematic destruction of a specific group of people. It is a grave violation of human rights and is considered one of the most heinous crimes under international law.