Restricted

Restricted is an adjective used to describe something that has limited access, availability, or conditions attached to its use. It signals that entry, handling, or distribution is controlled by rules, permissions, or specific criteria. The term derives from Latin restrictus, meaning bound back or limited, and has been in common use in legal, security, and policy contexts for centuries.

In information and data governance, restricted or restricted data designations indicate materials that require special authorization to view, copy, or share. Restricted data is often used for sensitive areas such as national security or defense, while restricted information can apply to business records, personal data, or confidential communications. Access is managed through classifications, need-to-know principles, and handling procedures.

In law, health, and safety, restricted substances, items, and areas are subject to regulation. Restricted substances include certain drugs or chemicals whose manufacture, possession, or distribution is tightly controlled. Restricted areas are locations with security measures and credential requirements to prevent unauthorized entry. Violations can carry legal penalties and safety risks.

In finance and everyday life, restricted status can apply to equity (restricted stock or restricted stock units subject to vesting) and to diets or permissions. A restricted diet limits certain foods for health reasons, while restricted access limits participation or visibility in various environments. The common thread is the imposition of controls to protect safety, privacy, security, or compliance.