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

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 In such cases, the interlopers would not supply Proven Data with a master key, which would have enabled the company to clear future incursions of the same ransomware for free. Renee Dudley, ProPublica, "The Trade Secret Firms That Promised High-Tech Ransomware Solutions Almost Always Just Pay the Hackers," 15 May 2019 Similarly, hotel rooms around the world are vulnerable to a hack that lets an intruder mimic a hotel's master key and open any door. Brian Barrett, WIRED, "Security News This Week: The Biggest DDoS For Hire Site Goes Down," 28 Apr. 2018 Then rooms are accessed with a master key, Kelly said. Libby Solomon,, "Renovations at Aigburth Vale, a seniors housing complex in Towson, nearly complete," 26 Apr. 2018 According to the researchers, whose claims were earlier reported on by Gizmodo, the software running on those keys, called Vision, has a vulnerability that allows criminals to create master keys and open any door in the facility. Don Reisinger, Fortune, "Millions of Hotel Rooms Are at Risk of 'Master Key' Hack," 25 Apr. 2018 One of the keys was an arrow master key that opened postal boxes on Palmerson Drive, Diablo Drive, Dieppe Way, Shade Tree Way, Keoncrest Circle, Porto Pino Way, Golden Vista Way, Burnbray Place and Copper Cove Place, the complaint says. Sam Stanton, sacbee, "‘Dude, I have a magical key for all mailboxes.’ Missing some mail? Better read this | The Sacramento Bee," 6 Apr. 2018

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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Statistics for master key

Last Updated

24 Aug 2019

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Time Traveler for master key

The first known use of master key was in 1577

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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)

More from Merriam-Webster on master key

Rhyming Dictionary: Words that rhyme with master key

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to spread over or through

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