An omnivorous slug found in Europe and the Pacific Northwest, Arion ater, not always black, despite the name.

(phytopathology) A fungal disease among plants, particularly roses, that results in black spots on the leaves.

A species of mulberry (Morus nigra), a small deciduous tree growing to 10–13 m tall and native to southwestern Asia. / The edible fruit of this tree.

(philately) The world's first official postage stamp, issued in 1840 in the United Kingdom as part of postal reforms.

A form of film punctuation in which the picture is instantaneously darkened.

(astronomy) A hypothesized white dwarf that has cooled down and no longer emits visible light.

Alternative spelling of pitch-black.

plural of Black Friday

(Ireland, UK, idiomatic, potentially offensive) Third-world charities, the missions.

Area in the West Midlands of England, birthplace of the Industrial Revolution.