What is the meaning of Black-and-white?

Of art, a photograph or photography, using shades of grey rather than shades of any other color.

Of a television or monitor, displaying images in shades of grey rather than color.

Classifying people, objects or concepts as two polar opposites, especially "right" and "wrong"; dichotomous and inflexible.

Alternative form of black and white (easily divided into diametrically opposing camps).

Alternative form of black and white

Source: wiktionary.org