The state of being strikingly different from something else in juxtaposition or close association. The contrast between the dark clouds and the bright sun was stunning.
A person or thing that is strikingly different from another. Her cheerful personality was a contrast to his gloomy demeanor.
The degree of difference between the lightest and darkest parts of a picture, television screen, etc. Adjusting the contrast on the TV made the image clearer.
A substance used in medical imaging to enhance the visibility of internal structures. The patient was given contrast before the CT scan.