Process to remove information from media such that information recovery is not possible. It includes removing all labels, markings, and activity logs.
Sources:
FIPS 200 under SANITIZATION from CNSSI 4009 - Adapted

  The removal of extraneous or potentially harmful data (e.g., malware) within a file or other information container (e.g., network protocol packet).
Sources:
CNSSI 4009-2022 under sanitize

  The removal of information from the storage device such that data recovery using any known technique or analysis is prevented. Sanitization includes the removal of data from the storage device, as well as the removal of all labels, markings, and activity logs. The method of sanitization varies depending upon the storage device in question, and may include degaussing, incineration, shredding, grinding, embossing, etc.
Sources:
CNSSI 4009-2022 under sanitize from NSA/CSS Policy Manual 9-12

  A process to render access to Target Data on the media infeasible for a given level of effort. Clear, Purge, and Destroy are actions that can be taken to sanitize media.
Sources:
NIST SP 800-37 Rev. 2
NIST SP 800-53 Rev. 5

  Actions taken to render data written on media unrecoverable by ordinary and — for some forms of sanitization — extraordinary means.
Sources:
NIST SP 800-171r3

  A process to remove information from media such that data recovery is not possible, including the removal of all classified labels, markings, and activity logs.
Sources:
NIST SP 800-171r3

  A process or method to sanitize.
Sources:
NIST SP 800-88r2

  To render access to target data on the media infeasible for a given level of effort.
Sources:
NIST SP 800-88r2 under sanitize

  Actions taken to render data written on media unrecoverable by both ordinary and, for some forms of sanitization, extraordinary means. Process to remove information from media such that data recovery is not possible.
Sources:
NIST SP 800-172r3