1. The opposition or dissimilarity of things that are compared Noun
2. The act of distinguishing by comparing differences Noun
3. A conceptual separation or distinction Noun
4. The perceptual effect of the juxtaposition of very different colors Noun
5. The range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness) Noun
6. Put in opposition to show or emphasize differences Verb
7. To show differences when compared; be different Verb