proof

noun B2

Meaning

Proof is evidence or a demonstration that something is true or valid, often used in contexts such as mathematics, law, or scientific research.
💡 A common mistake is to confuse "proof" with "prove"; "proof" is a noun while "prove" is a verb.

Example Sentences

The lawyer presented clear proof to support the client's claim .
The scientist showed proof of the experiment's success .

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