WordWeb Online

1. Provide evidence for; stand as proof of; show by one's behaviour, attitude, or external attributes
   - attest, manifest, demonstrate, evidence
    
2. Guarantee payment on; of checks
    
3. Authorize officially
   - license, licence [Brit, Cdn]
    
4. Guarantee as meeting a certain standard
   "certified grade AAA meat"
   - endorse, indorse
    
5. Declare legally insane

Derived forms: certifying, certifies, certified

See also: certifiable, certificate, certification, certificatory

Type of: adjudge, authorise [Brit], authorize, bear witness, clear, declare, evidence, guarantee, hold, pass, prove, secure, show, testify, warrant

Antonym: decertify

Encyclopedia: Certify