Hot Site

 Definition(s):

A fully operational offsite data processing facility equipped with hardware and software, to be used in the event of an information system disruption.

 Source: NIST CNSSI 4009-2015 from NIST SP 800-34 Rev. 1
NIST SP 800-34 Rev. 1 under Hot Site

An alternate facility that already has in place the computer, telecommunications, and environmental infrastructure required to recover critical business functions or information systems.

 Source: BCI/DRJ