Criterion vs Principle

When to use each in English, with meaning, register, and examples.

 CriterionPrinciple
MeaningA standard or rule used to judge something.A basic truth or rule that guides behavior
Registerformal-
CEFR levelB2B2
Part of speechnounnoun
Usage notesUsed primarily in academic or professional contexts to establish standards. Avoid in casual conversation unless discussing evaluations.Used in discussions about ethics, laws, or personal beliefs. Avoid using in casual conversations to maintain clarity, as 'principle' can be confused with 'principal', which refers to a person in a position of authority.

Frequently asked questions: Criterion vs Principle

What's the difference between "Criterion" and "Principle"?

"Criterion" means: A standard or rule used to judge something. "Principle" means: A basic truth or rule that guides behavior

When should I use "Criterion" and "Principle"?

"Criterion" is formal.

Are "Criterion" and "Principle" the same CEFR level?

"Criterion" is at B2, "Principle" is at B2 on the CEFR scale.

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