What is the definition of principle?

Answer 1

A principle is a basic rule, tenet, or belief.

(A principal is a chief administrator of a school.)
principle: "a fundamental truth or proposition that serves as a foundation for a system of belief or a chain of reasoning;" "a fundamental source or basis of something."

Answer 2

A principle is a fundamental truth or belief that forms the foundation for a system of behavior or decision-making. It serves as a guiding rule or code of conduct in how one acts or thinks in various situations.

Answer 3

A principle means a general truth, belief, or rule.

The term principles refers to a collection of values or morals for an individual, in that someone having "principles" is expected to display high moral character.