What is contradictive definition?

A contradictive definition is a definition that contradicts the nature or properties of the term being defined. In other words, it defines something in a way that is logically impossible. For example, defining "square" as a shape with three sides and a curved edge is contradictive because a square is defined as having four equal sides and four right angles. A contradictive definition can often lead to confusion and misunderstanding, and is generally avoided in formal settings.