Dot pitch is the space between pixels. The smaller the number, the sharper the image will appear. (.28mm is better than .32mm)
The amount of space between pixels in a monitor. The lower the number, the higher the monitor quality.
Refers to the width of a displayed dot on a raster display device. Often used to describe the capability of a screen or monitor (measurement is usually in millimetres -- e.g., .28 is 28/100ths of a millimetre).