certify meaning and definition

CERTIFY verb

Definition of certify (verb)

1. 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, demonstrate, evidence, manifest
2. guarantee payment on; of checks
3. authorize officially
   • "I am licensed to practice law in this state"
   • synonyms: licence, license
   • antonym: decertify
4. guarantee as meeting a certain standard
   • "certified grade AAA meat"
   • synonyms: endorse, indorse
5. declare legally insane