Initialism of British Leyland. / (UK military) Initialism of breechloader and breechloading.

Initialism of boys' love (“yaoi media”).

(US) Initialism of Bureau of Labor Statistics. / (stock ticker symbol) Abbreviation of BellSouth Corporation.

(medicine) Initialism of basic life support.

(law) Abbreviation of Blackstone's Commentaries on the Laws of England.

plural of BL Lac object

(astronomy) a type of active galaxy with an active galactic nucleus (AGN), named after its prototype, BL Lacertae

An American vulture species, Coragyps atratus, with black plumage. / A north African and Eurasian vulture species, Aegypius monachus.

(of an object) Absorbing all light and reflecting none; dark and hueless. / (of a place, etc) Without light.

(countable and uncountable) The colour/color perceived in the absence of light, but also when no light is reflected, but rather absorbed. / (countable and uncountable) A black dye or pigment.