The process of permanently ending the binding between a certificate and the identity asserted in the certificate from a specified time forward.
Sources:
CNSSI 4009-2015
from
CNSSI 1300
A process whereby a notice is made available to affected entities that keys should be removed from operational use prior to the end of the established cryptoperiod of those keys.
Sources:
NIST SP 800-57 Part 2 Rev.1
under Revocation