master key


Definition of master key

: a key designed to open several different locks

Examples of master key in a Sentence

Recent Examples on the Web My phone is the digital master key that unlocks my life. Dan Patterson, CBS News, "Why can't I vote on my phone?," 2 Nov. 2020 The tech at the dealership had a master key and replaced the locking lugs. Bob Weber, Star Tribune, "Motor Mouth: Is it time to shift to a car with an automatic?," 9 Oct. 2020 The trio from the opening scene enters a home, looking for the master key to the power plant. Ashley Chervinski,, "R29 Binge Club: Netflix’s Dark Final Season Recap," 28 June 2020 This visibility is a master key that can open all kinds of doors for black scientists to succeed, and for the world to benefit from their success. Aj Willingham, CNN, "In a time of sorrow, black joy needs to be seen as much as black pain. These scientists are showing it, with birds," 3 June 2020 Once locked, you're supposed to be the only one that can open your gun case, and the TSA models allow anyone with a master key in. The Editors, Field & Stream, "4 Ways to Protect Your Guns from Airline Baggage Handlers," 12 Aug. 2019 Gaining admin access to the hub was like getting a master key to any home that used Zipato’s tech. Zoe Schiffer, Vox, "The life of a white-hat hacker," 8 Aug. 2019 Prosecutor Alan Mizrahi: Marty Simms … had the master key to all the apartments in the complex. CBS News, ""To the families we owe justice": Inside NCIS' relentless quest to solve two cold case murders of Navy dependents," 3 July 2019 In other words, the ball is easy, the master key to the way out. San Diego Union-Tribune, "Column: MLB’s power surge could lead one to some juicy speculation," 30 June 2019

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.

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First Known Use of master key

1577, in the meaning defined above

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Time Traveler for master key

Time Traveler

The first known use of master key was in 1577

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Statistics for master key

Last Updated

7 Nov 2020

Cite this Entry

“Master key.” Dictionary, Merriam-Webster, Accessed 26 Nov. 2020.

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More Definitions for master key

master key


English Language Learners Definition of master key

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

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