(organic chemistry) Any chemical entity that is temporarily reacted with a functional group so as to protect it from a subsequent reaction

A software or hardware mechanism designed to prevent copying.

(construction) A sacrificial material used to shield a waterproofing material from damaging external forces.

The practice of protecting the natural environment by individuals, organizations and governments.

A government program that provides new identities and protection for witnesses who come forward and testify in court against dangerous targets.

(Internet) A proxy that controls access to a resource based on access rights.

plural of protection course

(crime) A criminal scheme in which victims are required to pay in order to avoid violence or destruction of property.

plural of protection racket

(law enforcement) Lawful confinement of a person or close supervision of his or her movements, on a voluntary or involuntary basis, by authorities in order to safeguard that person from attack or other dangers.