1. (

• attest ,
• certify ,
• manifest ,
• demonstrate ,
• evidence

) 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" ;

2. (

• certify ,

) guarantee payment on; of checks ;

3. (

• license ,
• licence ,
• certify ,

) authorize officially; "I am licensed to practice law in this state" ;

4. (

• certify ,
• endorse ,
• indorse ,

) guarantee as meeting a certain standard; "certified grade AAA meat" ;

5. (

• certify ,

) declare legally insane ;

1. (

• certified

) endorsed authoritatively as having met certain requirements; "a certified public accountant" ;

2. (

• certifiable ,
• certified

) fit to be certified as insane (and treated accordingly) ;

3. (

• certified ,
• qualified

) holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill; "a registered pharmacist"; "a registered hospital" ;