The process of confirming or denying that a claimed identity is correct by comparing the credentials of a person requesting access with those previously proven and associated with the PIV Card or a derived PIV credential associated with the identity being claimed.
Sources:
FIPS 201-3 under Identity Verification

  The process of testing the media to ensure the information cannot be read.
Sources:
NIST SP 800-88 Rev. 1 under Verification

  The process of confirming or denying that a claimed identity is correct by comparing the credentials (something you know, something you have, something you are) of a person requesting access with those credentials previously proven and stored in the PIV Card or system and associated with the identity being claimed.
Sources:
NIST SP 1800-12b

  Confirmation, through the provision of objective evidence, that specified requirements have been fulfilled (e.g., an entity’s requirements have been correctly defined, or an entity’s attributes have been correctly presented; or a procedure or function performs as intended and leads to the expected outcome). Adapted from Verification.
Sources:
NIST SP 1800-21B under Identity Verification from CNSSI 4009-2015

  Confirmation, through the provision of objective evidence, that specified requirements have been fulfilled (e.g., an entity’s requirements have been correctly defined, or an entity’s attributes have been correctly presented; or a procedure or function performs as intended and leads to the expected outcome).
Sources:
NISTIR 7622 under Verification from CNSSI 4009, ISO 9000 - Adapted

  Internal phase within the NVD where a second, usually more experienced, NVD Analyst verifies the work completed during the Initial Analysis.
Sources:
NISTIR 8246 under Verification