(web development) To focus on the inputs and outputs without worrying about the internal complexity.

Alternative spelling of blackjack / Caranx lugubris, a gamefish / Bidens spp., from the family of Asteraceae / (obsolete) The larva of a turnip sawfly (Athalia rosae) / (mining, mineralogy) Sphalerite.

(countable) A light bulb that emits ultraviolet light, usually used to create the illusion that anything white is glowing. / (uncountable, slang) ultraviolet radiation/light

Pertaining to Black Russia. / Used other than figuratively or idiomatically: see Black, Russian.

A cocktail containing vodka and a coffee-flavoured liqueur such as Kahlúa. / Used other than figuratively or idiomatically: see Black, Russian.

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 very dark blue. / Black with bluish highlights.

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

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

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