Impact

The effect on organizational operations, organizational assets, individuals, other organizations, or the Nation (including the national security interests of the United States) of a loss of confidentiality, integrity, or availability of information or an information system. 

See CNSSI 4009-2015 (FIPS 199 – Adapted),  NIST SP 800-53 Rev. 4 under Impact and NISTIR 7621 Rev. 1 under Impact (NIST SP 800-53 Rev. 4) for more information. 
 

The effect on organizational operations, organizational assets, individuals, other organizations, or the Nation (including the national security interests of the United States) of a loss of confidentiality, integrity, or availability of information or a system. 

See NIST SP 800-171 Rev. 1 for more information. 
 
The magnitude of harm that can be expected to result from the consequences of unauthorized disclosure of information, unauthorized modification of information, unauthorized destruction of information, or loss of information or information system availability. 

See NIST SP 800-34 Rev. 1 under Impact, NIST SP 800-60 Vol. 1 Rev. 1 under Impact and  NIST SP 800-60 Vol. 2 Rev. 1 under Impact for more information.