What is cornerstone definition?

A cornerstone is a fundamental or an essential part of something. It is a stone that forms the base of a building's foundation and is usually the first stone to be laid. The cornerstone is significant because it sets the shape, size, and position of the building, and the rest of the structure is built around it.

The term "cornerstone" is frequently used metaphorically to describe something that is crucial or pivotal. It might refer to a critical principle, belief, or tradition that serves as the basis for something larger. The cornerstone is considered an essential part of any structure as it provides stability and support.

In the field of education, the term "cornerstone" may refer to a course or program that forms a crucial part of a student's education. In a business context, cornerstone products or services are those that are essential to a company's operations or its brand identity.

Overall, the term cornerstone is often used to describe something that is foundational, necessary, and essential.