File in which every pixel on screen is represented by a piece of data in memory, usually graphics, although some audio formats are described as bitmapped as well. As opposed to a vector image, in which only a description of the image is stored. A representation, consisting of rows and columns of dots, of a graphics image in computer memory. The value of each dot (whether it is filled in or not) is stored in one or more bits of data. A digitized image that is mapped into a grid of pixels. The color of each pixel is defined by a specific number of bits.