master key

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master key

The janitor uses a master key to unlock the main office door.

Definition
  1. Noun:
    • A key that opens many different locks: A single key designed to open a set of locks, typically within a specific building or system, providing access to multiple areas.
Usage
  • The noun "master key" refers to a physical key or a digital/electronic equivalent that grants broad access. It is used to describe a key held by a person in authority (like a building manager or head custodian) that can open many individual locks for which separate, unique keys also exist.
  • It is often used in contexts of security, property management, and access control.
Examples
  • Noun:
    • The hotel manager carries a master key that can open every guest room in case of an emergency.
    • The building's maintenance staff uses a master key system to access all offices and utility closets.
    • Losing a master key is a serious security breach, as it compromises multiple doors.
Advanced Usage
  • "to have/be a master key to something" (figurative): To possess or be the essential means to understanding or achieving something.
    • Patience and observation are the master key to understanding animal behavior.
  • Master key system (noun phrase): A comprehensive locking system where individual locks are operated by their own unique keys, but all can also be operated by one or more master keys.
    • The new office complex was installed with a sophisticated master key system for efficient security management.
Variants and Related Words
  • Skeleton key (noun): A type of key designed to fit many locks by having a simple, minimal bit. While similar in function, a "skeleton key" is often associated with older locks and may imply bypassing security, whereas a "master key" is usually part of an authorized, modern system.
  • Passkey (noun): A synonym for master key, often used in the context of hotels or electronic access.
  • Override key (noun): A key that can bypass a lock's normal mechanism, similar in function to a master key.
Synonyms
  • Passkey: A key for gaining passage or entry.
  • Skeleton key: A key with a simplified bit to open many simple locks.
  • General key: A less common term with the same meaning.
Related Phrases
  • Master keying (gerund/noun): The process or technique of configuring a set of locks to be operated by a master key.
    • The locksmith specialized in master keying for large apartment buildings.
master key

The janitor uses a master key to unlock the main office door.

Noun
  1. key that secures entrance everywhere

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