Definition of principle:

part of speech: verb

To establish in principles: to impress with a doctrine.

part of speech: noun

A fundamental truth: a law or doctrine from which others are derived: an original faculty of the mind: a settled rule of action: ( chem.) a constituent part.

part of speech: noun

A source or cause; a settled rule or law of conduct; a truth which is general and fundamental; as, the principles of government; reason; uprightness.

Usage examples for principle:

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Resembling or consisting of membrane; pliable and semitransparent. ...