📒 a difference between two or more people or things that you can see clearly when they are compared or put close together; the fact of comparing two or more things in order to show the differences between them
📒 a person or thing that is clearly different from somebody/something else
📒 differences in colour or in light and dark, used in photographs and paintings to create a special effect
📒 the amount of difference between light and dark in a photograph or the picture on a television screen