1. [verb] provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes; "His high fever attested to his illness"; "The buildings in Rome manifest a high level of architectural sophistication"; "This decision demonstrates his sense of fairness"
    Synonyms: attest, manifest, demonstrate, evidence

  2. [verb] guarantee payment on; of checks

  3. [verb] authorize officially; "I am licensed to practice law in this state"
    Synonyms: license, licence

  4. [verb] guarantee as meeting a certain standard; "certified grade AAA meat"
    Synonyms: endorse, indorse

  5. [verb] declare legally insane


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