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1. a black-and-white photograph or transparency
2. Photog black and white
a. a painting, drawing, etc., done in a range of tones of a single colour
b. the technique or art of this
4. executed in or resembling monochrome
literally, of a single color. The term is often used in reference to works of art executed in a single color or various tones of that color. An example is a grisaille.
Having only one chromaticity.
Literally "one colour". Usually used for a black and white (or sometimes green or orange) monitor as distinct from a color monitor. Normally, each pixel on the display will correspond to a single bit of display memory and will therefore be one of two intensities. A grey-scale display requires several bits per pixel but might still be called monochrome.
monochromeAlso called "mono." Refers to display screens that use one foreground and one background color; for example, black on white, white on black or green on black. The first terminals connected to mainframes and minicomputers were monochrome, and monochrome screens were widely used on early personal computers.
Monochrome vs. Grayscale
Quite often, a non-color monitor is called monochrome; however, if it displays shades of the single color, then it is a grayscale monitor. See pixel and color depth.