What does Blockaelteste mean in German?

Answer 1

In Nazi concentration camps, der Blockaelteste was the senior Kapo or 'trusted prisoner' (trusted by the SS, that is) for a block or large hut. He (or she) was usually in charge of food distribution in the hut and had disciplinary powers over the other inmates. Some had the power to whip other prisoners. The word is only used in this specific sense.