What is the meaning of Principle?

A fundamental assumption or guiding belief.

A rule used to choose among solutions to a problem.

Moral rule or aspect.

A rule or law of nature, or the basic idea on how the laws of nature are applied.

A fundamental essence, particularly one producing a given quality.

A chemical compound within plant or animal tissue that is characteristic of it and more or less peculiar to it, such that it defines the character of that tissue from a human viewpoint (as for example nicotine in tobacco).

A source, or origin; that from which anything proceeds; fundamental substance or energy; primordial substance; ultimate element, or cause.

An original faculty or endowment.

Misspelling of principal.

A beginning.

To equip with principles; to establish, or fix, in certain principles; to impress with any tenet or rule of conduct.

Source: wiktionary.org