1. to provide or serve as clear evidence of; to certify or confirm as true or genuine
2. to declare or affirm solemnly and formally as true
Usage: formal

Examples

• The certificate attests to her completion of the course.
• His success attests to years of hard work and dedication.
• The witness attests that she saw the defendant at the scene.
• The document attests the authenticity of the artwork.
• Her fluency in three languages attests to her linguistic abilities.
• The notary attests the signature on the legal document.
• The ruins attest to the city’s former glory.