Read the dictionary definition of attest. All definitions for this word.
1. authenticate, affirm to be true, genuine, or correct, as in an official capacity
1. I attest this signature
2. establish or verify the usage of
1. This word is not attested until 1993
3. provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes
1. His high fever attested to his illness
2. The buildings in Rome manifest a high level of architectural sophistication
3. This decision demonstrates his sense of fairness
4. give testimony in a court of law
