Definition of attest
- The first use of the word "Internet" is attested in 1985.
- Her record attests her integrity.
- I can attest to the truth of his statement.
- attest to a belief
I can attest that what he has said is true.
The certificate attests the authenticity of the painting.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'attest.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: to show, prove, or state that something is true or real
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