(medicine, historical) A pandemic outbreak of bubonic plague throughout Europe and most of Asia in the 14th century that killed nearly half the population of Europe and Asia.

A very dark blue. / Black with bluish highlights.

Of a very dark blue. / Black with bluish highlights.

Of art, a photograph or photography, using shades of grey/gray rather than colour/color. / Of a television or monitor, displaying images in shades of grey/gray rather than colour/color.

A practice such as witchcraft, sorcery, necromancy, or black magic. / (figuratively, by extension) A process that is mysterious or difficult to master.

(US, slang, law enforcement) A police patrol car. / (US, slang, by extension) The police, a police officer or the clothing they wear.

Alternative form of black-and-white (of an image, a video, etc: in black, white, and perhaps shades of grey, rather than in colour)

(Australia, New Zealand) A small cup or glass of espresso coffee.

A bean plant with black seeds. / A dried seed of a black bean plant. / A dried black seed of certain varieties of the common bean, Phaseolus vulgaris. / A fermented soybean, used in Asian cooking.

(transitive) To censor or cover up by writing over with black ink. / (transitive, figuratively) To censor or cover up. / (intransitive) To lose consciousness; to suffer a blackout.