certified adj. 1. endorsed authoritatively as having met certain requirements; guranteed; as, certified milk; certified mail; a certified check. Opposite of uncertified. [Narrower terms: certificated, credentialed, documented; guaranteed] See also certifiable.[WordNet 1.5]
2. legally insane according to clinical criteria.Syn. -- certifiable.[WordNet 1.5 +PJC]
3. holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill.Syn. -- qualified.[WordNet 1.5]