फ़्लैशकार्ड

A principle is always a noun that names a basic rule, belief, natural law, or ethical standard. It represents an abstract idea that guides action. Principal can function as both a noun and an adjective. As a noun, it refers to a person holding the highest authority in an organization or the original sum of money in a financial agreement. As an adjective, it describes the most important, primary, or leading item among a group.

The company directors agreed to the new environmental policy in principle.