contradistinction
Contradistinction is a term used to describe the act of distinguishing something by contrasting it with its opposite. It is a method of definition and understanding that relies on highlighting differences rather than similarities. When something is defined by contradistinction, its meaning is clarified by explaining what it is not, and by placing it in direct opposition to another concept. This process helps to isolate the unique characteristics of the subject in question.
For example, one might define light by its contradistinction to darkness. Light is understood as the absence