Meaning

1. black, reflecting little or no light
2. illegal
3. black, having a high amount of melanin in an organ, e.g. the skin
4. of the CDU or CSU (large center-right Christian Democratic parties, whose associated colour is black)
5. without milk
6. not having won any trick (or only tricks with zero points)
7. Goth (of Goth music or culture, called schwarze Szene (“black scene”) in German)