1. The comparison of a thing or an individual that shows differences when juxtaposed with another: There is a marked contrast between a child who is obedient and one who contradicts, or "speaks against" those in authority, his elders.

In order to provide contrast in her outfit, Wendy chose to wear a green skirt and a red blouse.
2. A great dissimilarity between two or more entities that are apparent when compared: The old computer operated very slowly in contrast to the newest model Clifford decided to buy.