vb, -fied  -fy*ing vt  1  :  to attest authoritatively : esp  :  to attest officially to the insanity of  2  :  to designate as having met the requirements to practice medicine or a particular medical specialty vi  :  to attest by a certificate <five year program leading to examination by the American Board which certifies in that specialty -Bull. of Meharry Med. Coll.>  cer*ti*fi*able adj cer*ti*fi*ably adv 
 
 
 
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