master key

noun
Updated on: 21 Apr 2018

Definition of master key

: a key designed to open several different locks

Recent Examples of master key from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'master key.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of master key

1577


MASTER KEY Defined for English Language Learners

master key

Definition of master key for English Language Learners

  • : a key that can be used to open many locks (such as all the door locks in a building)


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