security

Freedom from risk or danger; safety.

Freedom from doubt, anxiety, or fear; confidence.

Something that gives or assures safety, as.

A group or department of private guards.

Measures adopted by a government to prevent espionage, sabotage, or attack.

Measures adopted, as by a business or homeowner, to prevent a crime such as burglary or assault.

Measures adopted to prevent escape.

Something deposited or given as assurance of the fulfillment of an obligation; collateral.

One who undertakes to fulfill the obligation of another; a surety.

A financial instrument, such as a stock or bond, representing rights of ownership or creditorship and often traded in secondary markets.