certify /sur″tifī/ , 1. to guarantee formally that certain requirements based on expert knowledge of significant, pertinent facts have been met. 2. to attest, by a legal process, that someone is insane. 3. to attest to the fact of someone’s death in writing, usually on a form required by a local authority. 4. to declare that a person has satisfied certain requirements for membership or acceptance into a professional or other group. See also board certification. −certification, n.
