An amount of money paid in advance as security against the payor's non-performance of a contractual obligation.

A government organisation established to protect its nation and its secrets from enemies. / Used other than figuratively or idiomatically: see security, service.

(computer security) An entity capable of being authenticated by a computer system or network.

plural of security community

plural of security interest

(law) The right of a lender to take possession of collateral offered to secure the loan.

A producer of printed documents or products which are physically protected against forgery, counterfeiting and alteration by security features

Of a prison, having limited security and offering prisoners certain freedoms.

The safety of a country as managed through the exercise of economic and political power, intelligence agencies and diplomacy.

A video camera used to protect a building from intruders and to detect crime and other issues.