What does bit map mean?

bit map meaning in Law Dictionary

The monochrome picture on some type of computer. Each dot fits the bit on memory. Each pixel needs 8 or higher bit depth.

bit map meaning in Business Dictionary

Representation of a monochrome computer picture, which each dot on display fits corresponding little bit held in the computer's memory. Gray-scale and coloured images are made up of pixels, each requiring a bit-depth of 8 bits or even more.