Watering Hole  Definition(s): Watering hole attacks involve attackers compromising one or more legitimate Web sites with malware in an attempt to target and infect visitors to those sites.  Source: NIST

Best Practice  Definition(s): Proven activities or processes that have been successfully used by multiple organizations.  Source: ITIL

Authorization  Definition(s): Access privileges granted to a user, program, or process or the act of granting those privileges.  Source: CNSSI-4009