(simile) Utterly black; pitch-black.

(usually considered derogatory) The Superior General of the Society of Jesus.

plural of black diamond

hematite / anthracite / carbonado, a natural diamond that is black in colour / A black synthetic diamond, specifically a CVD polycrystalline diamond or HPHT polycrystalline compact diamond.

(US politics, historical) A member of the Black Panther Party, a revolutionary black nationalist and socialist organization active in the United States from 1966 until 1982.

(humanities) an interdisciplinary academic discipline concerned with the study of culture relating to African peoples and the African diaspora.

A Chinese gang or triad.

plural of black society

A type of extortion racket, typically involving sending a letter demanding that the victim leave a sum of money in an agreed location to avert a threatened kidnap, arson, murder, etc.

Clipping of black rhinoceros.