Security refers to measures taken to protect individuals or states from threats such as violence, terrorism, or invasion. It encompasses both physical safety as well as protection against economic instability or cyber attacks.
Related terms
National Security: The protection of a nation's sovereignty, territory, and citizens from external threats.
Cybersecurity: Measures taken to protect computer systems and networks from unauthorized access or damage by hackers.
Human Security: A concept that focuses on protecting individuals from various threats including poverty, hunger, disease, political repression, and environmental degradation.