Allegedly vs Supposedly

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

 AllegedlySupposedly
MeaningIt is said that something is true, but it hasn't been proven.Something is believed to be true, but it may not be.
CEFR levelC1C1
Part of speechadverbadverb
Usage notesUse 'allegedly' when reporting accusations or claims that are not confirmed. It's common in news articles but less so in casual conversations.Use 'supposedly' when describing something that is commonly accepted but may not be true. It's neutral and generally suitable in both spoken and written contexts, but avoid in informal conversations.

Frequently asked questions: Allegedly vs Supposedly

What's the difference between "Allegedly" and "Supposedly"?

"Allegedly" means: It is said that something is true, but it hasn't been proven. "Supposedly" means: Something is believed to be true, but it may not be.

When should I use "Allegedly" and "Supposedly"?

They can all be used in everyday English.

Are "Allegedly" and "Supposedly" the same CEFR level?

"Allegedly" is at C1, "Supposedly" is at C1 on the CEFR scale.

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