General Science


  • noun the amount of light and dark in something seen



  • On a display screen, such as that of a computer or TV, the difference in brightness between the lightest and darkest areas. Also called screen contrast (2).
  • In optical character recognition, differences in qualities such as color or shading, which help distinguish a character from the background.

Information & Library Science

  • noun a big difference between two things which is clear when they are compared

Media Studies

  • noun the effect created when very different things such as colours, shades or textures are placed near or next to each other
  • noun the different levels of brightness and darkness in a single image or moving image