Definitions for "Security Incident"
It is an adverse event that poses a threat to your computer in respect of confidentiality, integrity, availability, non-repudiation and authentication.
Any act or circumstance that involves classified information that deviates from the requirements of governing security publications. For example, compromise, possible compromise, inadvertent disclosure, and deviation.
a failure to safeguard classified materials in accordance with regulations and can be either an infraction or a violation