(of a prison) Having a high level of security, designed to house the most dangerous of prisoners.

plural of security interest

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

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

plural of security community

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

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.

Security measures which are intended to, or do, provide a feeling or illusion of improved security, while doing little or nothing to actually improve security.

(security, computing) Relying on a secure design to defend against attacks.