Meaning & use
principle
A fundamental truth, rule, or belief that guides behavior or explains how something works.
See it in a sentence
She refused to compromise her principles, even under intense outside pressure.
The engine works on the principle of converting heat into motion.
A note on using this word
Do not confuse principle (a rule or belief) with principal (a person in charge, or a main sum of money); they are homophones.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Make it your own
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