verb (used with object), de·cer·ti·fied, de·cer·ti·fy·ing. to withdraw certification from.

What does decertification mean?

: to withdraw or revoke the certification of decertified the class action suit especially : to withdraw the certification of (a labor union) as a collective bargaining agent petitions to decertify the union.

What is decertification science?

Desertification is a type of land degradation in drylands in which biological productivity is lost due to natural processes or induced by human activities whereby fertile areas become increasingly arid.